Category Archives: PGS

Potomac Geophysical Society

PGS: Space Geodesy Project

The April, 2014, meeting of the Potomac Geophysical Society will be held April 17th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Abstract: NASA’s Space Geodesy Project, Stephen M. Merkowitz, NASA Goddard Space Flight Center, Greenbelt, MD: NASA’s Space Geodesy Project (SGP) recently completed a prototype core site as the basis for a next generation Space Geodetic Network that is part of NASA’s contribution to the Global Geodetic Observing System (GGOS). This system is designed to produce the higher quality data required to establish and maintain the Terrestrial Reference Frame and provide information essential for fully realizing the measurement potential of the current and future generation of Earth Observing spacecraft. The prototype core site is at NASA’s Geophysical and Astronomical Observatory at Goddard Space Flight Center and includes co-located, state of-the-art, systems from all four space geodetic observing techniques: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite Systems (GNSS), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS). A system for monitoring of the “ties” between these four systems is an integral part of the core site development concept and this specific prototype. When fully implemented, this upgraded global network will benefit in addition to the ITRF, all other network products (e.g. precision orbit determination, local & regional deformation, astrometry, etc.) that will also be improved by at least an order of magnitude, with concomitant benefits to the supported and tracked missions, science projects, and engineering applications. This presentation will summarize the results of the prototype site demonstration and provide the motivation and plans for NASA’s next generation geodetic network.

Biography:  Stephen Merkowitz is a scientist and project manager at NASA Goddard Space Flight Center. His research interests include: fundamental tests of General Relativity, lunar and interplanetary laser ranging, and space geodesy. He received his PhD in Physics from Louisiana State University working on gravitational wave antennas, and continued this research for two years in Frascati, Italy on a National Institute for Nuclear Physics (INFN) fellowship. In 1998 he became a Research Associate at the University of Washington where he performed experimental tests of General Relativity and measurements of Newton’s gravitational constant (which remains the most precise measurement of “big G” to date). In 2000, he moved to NASA Goddard to serve as Deputy Project Scientist for the LISA Project, a space based gravitational wave mission. In 2009, Merkowitz went on a yearlong detail to the Executive Office of the President covering Physical Science and Engineering for the Office of Science and Technology Policy, followed by a detail at NASA Headquarters as Assistant Director of the Astrophysics Division. He returned to Goddard in 2011 and now manages NASA’s Space Geodesy Project and is Principal Investigator for the Global Positioning System Laser Retroreflector Array.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001540-888-3001 or via E-mail at fraser.robert@comcast.net.If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email tofraser.robert@comcast.net.

PGS: Lyle Mars on ASTER-mapping

Title: Hydrothermal alteration mapped using ASTER data, and how the hydrothermal alteration maps are applied to define potential economic deposit targets and to assess volcano debris flow hazards.

Speaker: John Carlyle Mars (Nickname Lyle) was born and raised in Mobile, Alabama and received his B.S. and M.S. degrees from the University of Alabama and a Ph.D. from the University of Kentucky. Lyle has worked for the last 16 years at the U.S. Geological Survey in the Eastern Mineral and Environmental Resources Science Center in Reston, Virginia. Lyle’s primary focus is the spectroscopic study and mapping of rocks and minerals associated with economic mineral deposits using multispectral and hyperspectral imaging instruments.

 

Abstract: Hydrothermally altered rocks contain clays and hydrous silica that exhibited diagnostic Al-OH and O-H spectral absorption features in the short wave infrared region (SWIR). Hydrothermally altered rocks are typically associated with economic deposits of copper, gold, silver, and molybdenum. In addition, hydrothermal alteration weakens volcanic slopes on volcanoes and increases the potential for debris flows and avalanches. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and Interactive Data Language (IDL) logical operator algorithms have been used to map hydrothermal alteration on volcanic edifices and to regionally map volcanic and magmatic arcs in order to identify targets of potential economic deposits in Iran, Pakistan, Afghanistan, Kazakhstan and the central and southern parts of the U.S. Basin and Range. Mineral map units of hydrothermal alteration features include hydrothermal silica, calcite-dolomite and epidote-chlorite (propylitic), alunite-pyrophyllite-kaolinite (argilllic), sericite-muscovite (phyllic) and jarosite. This talk will show how hydrothermal alteration is mapped using ASTER data, and how the hydrothermal alteration maps are applied to define potential economic deposit targets and to assess volcano debris flow hazards.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Pratt on New Madrid

The February, 2014, meeting of the Potomac Geophysical Society will be held February 20th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

“The New Madrid seismic zone: Structure, earthquake potential and the debate over building codes” by Thomas L. Pratt, Ph.D., U.S. Geological Survey, Reston, VA,

The New Madrid Seismic Zone (NMSZ) area of the Central U.S. has seen Cambrian to Ordovician rifting and subsequent compression, subsidence and shearing. The southern arm of the NMSZ is coincident with the anticlinal Blytheville Arch (BA), which seismic reflection data presented here indicate is a pop-up structure within a strike-slip fault system along the Cambrian graben’s axial fault. The BA has perhaps the densest concentrations of faults in the region, but numerous faults that cut shallow (Eocene?) strata outside of the BA indicate that earthquakes have not been restricted to the NMSZ. Modern seismicity outlines the Reelfoot fault stepover in the strike-slip New Madrid fault system (NMFS), and comparison with the fault pattern in analog models of stepovers and restraining bends suggests that deformation caused by this stepover controls the extent of NMSZ seismicity. About 4.3 to 5 km of post-Eocene(?) slip on the southern arm of the NMSZ can be estimated from apparent shearing of the southern portion of Crowley’s Ridge, a north-trending, fault-bounded topographic ridge. This apparent displacement of Crowley’s Ridge suggests that slip extends south of the NMSZ. Only a small fraction of this long-term slip is expressed as uplift above the Reelfoot reverse fault, suggesting that strike-slip motion on the southern arm of the NMSZ continues north of the Reelfoot fault. The NMFS thus appears to be part of a broad set of strike-slip faults that spans the Reelfoot rift, with long-term slip continuing north and south of the modern seismic zone.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Lathrop on the core

The January, 2014, meeting of the Potomac Geophysical Society will be held January 16th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

 Daniel Lathrop

Title: Laboratory models of the Earth’s Core

 Abstract: Deep within the Earth, a turbulent rotating ocean of liquid iron generates the planetary magnetic field. That field changes over time in complicated ways. It has declined 10% in the last 160 years, fueling speculation that it may reverse. Unfortunately, we lack predictive scientific theories for the future evolution of the geodynamo. Experiments may play a role in the development of predictions, by enabling benchmarks of computer models not possible on direct Earth data. We have built a sequence of rapidly rotating turbulent liquid metal experiments that attempt to match parameters with the Earth’s core. Our observations highlight the importance of Coriolis effects and waves as well as magnetic forces in planets.

 

 

Daniel Lathrop received a B.A. in physics from the University of California at Berkeley in 1987, and a Ph.D. in physics from the University of Texas at Austin in 1991. He then served at Yale University as a postdoctoral fellow, research affiliate, and lecturer, and as Assistant Professor at Emory University. He joined the University of Maryland in 1997, the year he received a Presidential Early Career Award from the National Science Foundation. Daniel Lathrop is now Professor of Physics and Professor of Geology and a Fellow of the American Physical Society. His research in the Nonlinear Dynamics group at Maryland focuses on turbulent fluid flows, geomagnetism, and experiments on superfluid helium. Dr. Lathrop is also currently Associate Dean for Research for the College of Computer, Mathematical and Natural Sciences, and served as the Director of the Institute for Research in Electronics and Applied Physics from 2006 to 2012. He received the Stanley Corrsin Award in 2012 from the American Physical Society for this work in quantum fluids.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Virginia uranium

The September, 2013, meeting of the Potomac Geophysical Society will be held September 19th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Joseph G. Aylor, Jr., Ph.D., C.P.G. Chief Geologist, Virginia Uranium Inc.

Joseph G. Aylor, Jr. received a BA in geology from the University of Virginia in 1970 and an MS in geology from Arizona State University in 1973. Dr. Aylor’s work in uranium exploration and in mines began in 1973, working for Pechiney, Ugine, Kuhlmann, Inc. and Minatome Corp. From 1977 to 1984, he worked for Phillips Petroleum Company in uranium exploration in Texas, New Mexico, Arizona, California, Utah, Colorado, Wyoming, Nebraska, Idaho, Washington, Nevada, and South Dakota. Other work included mineral exploration for tungsten, gold, and silver.

In 1994, Dr. Aylor obtained his PhD in geology from Florida State University. From 1996 to 2007 he worked in the environmental services field for Batta Environmental Associates, Inc., WIK, Inc., Brightfields, Inc. and ECS, LLC. Environmental work included Phase I Environmental Site Assessments, petroleum tank spill remediation, and design and supervision of asbestos removal. In 1998 Dr. Aylor obtained his PG by ASBOG from a Pennsylvania examination and reciprocated it in Virginia, Delaware and North Carolina.

In May 2007, Dr. Aylor became the Chief Geologist in program management for Virginia Uranium, Inc. He helped coordinate the re-drilling for confirmation NI-43-101 reports at the Coles Hill uranium site located in Chatham, Virginia. In addition, he has coordinated all of the on-site baseline monitoring and research studies currently in progress.

Abstract:  Since 1982, Virginia has had in place a moratorium on uranium mining. In light of the potential economic benefit to Virginia, the Coal and Energy Commission initiated a re-evaluation to lift the uranium mining moratorium and commissioned a National Academy of Sciences study issued on December 19, 2011 and also commissioned a socio-economic study completed on November 29, 2011, by Chmura Economics & Analytics. Research Triangle Institute, ORI, and Center for Regional Analysis at George Mason University also completed socio-economic studies. Of special interest today is the Governor’s directive by executive order of January 19, 2012 when the Uranium Working Group (UWG) was established to draft a regulatory framework for uranium mining at Coles Hill in Pittsylvania County, Virginia. On November 30, 2012, the Wright Environmental, Inc. report for UWG established a “draft statutory proposal and conceptual regulatory framework” for the Virginia Department of Mines, Minerals and Energy, the Virginia Department of Environmental Quality, and the Virginia Department of Health. In early 2013 a bill to formally write regulations was not introduced, so it will be re-introduced in the next Legislative session.

 

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Galvin on sand transport in New Jersey

The April, 2013, meeting of the Potomac Geophysical Society will be held April 18th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Cy Galvin will speak on: Dominant, Northward-Directed, Sand Transport on the Jersey Shore

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: airborne data for the Mineral earthquake area

The March, 2013, meeting of the Potomac Geophysical Society will be held March 21st at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Airborne magnetic, gravity, and radiometric data delineate shallow and subsurface geological features associated with the Aug. 23, 2011 earthquake in Louisa County, VA

The M5.8 August 23, 2011 Louisa County, VA intraplate earthquake was felt by more people than any other in U.S. history not only because of population density, but also because of the associated geology. However, because the earthquake hypocenter is located at a depth of ~6 km, and limited bedrock exposures in central Virginia pose a challenge to geologic mapping, many questions remain. Potential field and gamma-ray spectrometry data thus provide key tools for imaging and understanding both shallow and deep subsurface geologic features.

In 2012, the USGS commissioned a high-resolution airborne magnetic, gravity, and radiometric (gamma-ray spectrometry for K, Th, and U) survey over the epicenters of the Louisa County earthquake and its aftershocks. This survey, flown ~120 m above ground with 200-m flight line spacing, provides up to a 20-fold improvement over existing geophysical data coverage. The new data show anomalies that correspond strongly to mapped geologic features as well as other anomalies that suggest how contacts might extend into areas lacking detailed mapping, or how they might continue at depth. Features of particular interest include granitoid intrusions, Jurassic dikes, contacts between metavolcanic and metasedimentary rocks, and shallow faults. Matched filtering and forward modeling of the potential field data was conducted to consider deeper features that may be related to the M5.8 causative fault. Additionally, maps derived by merging the 2012 data with regional surveys suggest how geologic structures may have impacted the propagation of seismic energy along the eastern seaboard.

Bio: Anjana (“Anji”) Shah has been a research geophysicist with the USGS’s Crustal Imaging and Characterization Science Center in Denver, CO since 2007.  She specializes in the use of gravity and magnetics for geologic characterization and interpretation, and is currently working on several projects focused on mineral resource and earthquake hazard applications in the Eastern U.S. and southern Alaska. She received her Ph.D. from Columbia University’s Lamont-Doherty Earth Observatory, where she developed numerical models of tectonic and magmatic processes at mid-ocean ridges, and conducted studies of high-resolution AUV seafloor bathymetry and magnetic anomalies. Following that she was an NRC postdoc at the Naval Research Laboratory, where she used gravity and magnetic data to constrain structure and melt properties of the buried Chesapeake Bay Impact Structure. Prior to joining the USGS, Dr. Shah was a research scientist at Dynamics Technology (now part of Raytheon), where she developed methods of interferometric synthetic aperture sonar (InSAS) and approaches to fusing acoustic and magnetic sensor data for high-resolution seafloor mapping and mine detection.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Atlantic OCS Hydrocarbon Exploratio

The February, 2013, meeting of the Potomac Geophysical Society will be held February 21st at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Atlantic OCS Hydrocarbon Exploration – Past, Present and Future by Harold E. Syms

Abstract–There currently is a flurry of hydrocarbon exploration and development activities virtually all around the rim of the Atlantic with the conspicuous absence of the U.S. OCS.  The activities are occurring off Newfoundland and Nova Scotia in Canada, off the west coast of Africa from Mauritania in the north to Namibia in the south, and off South and Central America from the Surinam and Guiana to Brazil to the Falkland Islands.

This presentation will discuss the magnitude and results of the single round of leasing and exploration of the U.S. OCS that occurred from the 1960’s through the 1980’s and  will present our current (2011) assessment of undiscovered oil and gas resources, based on both the data gathered during that round exploration, and world-wide analogs.

Currently BOEM is producing a Programmatic Environmental Impact Statement (PEIS) to evaluate potential significant environmental effects of multiple geological and geophysical (G&G) activities on the Atlantic OCS.  The proposed action is to permit G&G activities in support of oil and gas exploration and development, renewable energy, and marine minerals in the Mid- and South Atlantic Planning Areas.   To date there have been over 20 applications for permits to gather 2-D seismic, magnetic, and gravity data for hydrocarbon exploration on the Atlantic OCS.

Although with conclusion of the PEIS, G&G data gathering will likely be permitted in the mid- and south-Atlantic OCS planning areas, these areas were not included in the 2012-2017 Five Year Outer Continental Shelf (OCS) Oil and Gas Leasing Program, and therefore any federal leasing will occur sometime beyond 2017.

Bio–Harold E. Syms is the Chief of the Resource Evaluation Division of the Bureau of Ocean Energy Management (BOEM) in Herndon, VA.  The BOEM is part of the U.S. Department of Interior and manages the exploration and development of the nation’s offshore oil and gas and renewable energy resources.  He has held various positions in Los Angeles and Camarillo California, as well as the Washington D.C. area.  From 1988 through 2003 he served as the Chief of Reserves, Resources and Economic Analysis for the Minerals Management Service’s (MMS) Pacific OCS Region.  His responsibilities included resource economic evaluations for reserves and resource assessments in Federal offshore California, Oregon, and Washington.  He joined MMS’s predecessor, the Conservation Division of the U.S. Geological Survey in 1977.  His experience includes reservoir analyses, reserves determinations, well log analyses, and economic evaluations of fields and prospects in the Pacific OCS Region.  He has also served as an expert witness on the petroleum geology and reserves of the Pacific OCS Region.  Harold is a graduate of California State University, Northridge with a B.S. Degree in Geology.  Professional affiliations include membership in the American Association of Petroleum Geology, the Coast Geological Society, and the Society of Petroleum Engineers.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Urban trees

The January, 2013, meeting of the Potomac Geophysical Society will be held January 17th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Trees in the City: Urban Tree Cover Dynamics in the District of Columbia
Andrew Johnston, Terrestrial Cartography, Air And Space Museum, Smithsonian Institution

Tree cover is an important element of the urban environments that play an increasingly larger role in ecosystem processes. Urban forests change as trees grow, die, and are replaced. This presentation describes how satellite remote sensing data are being utilized to make reliable observations urban tree cover variability through time and why it matters to urban residents. Highly calibrated satellite data are being used to map changes in tree cover within the District of Columbia 1984-2004. The implications of tree cover variability are described for urban ecosystems and for understanding influences on urban forests.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to fraser.robert@comcast.net.

PGS: Leith on fracking

The November, 2012, meeting of the Potomac Geophysical Society will be held November 15th at the Fort Myer Officers’ Club in Arlington, VA (http://www.jbmhhmwr.com/index/Maps_and_Directions.html) in the Glassed-in room in the Fife and Drum (main dining room).

Abstract:  To produce natural gas from shale formations, it is necessary to increase the interconnectedness of the pore space (permeability) so that the gas can flow through the rock mass and be extracted through production wells. This is usually done by hydraulic fracturing (“fracking”).  In addition to natural gas, fracking fluids and formation waters are returned to the surface. This wastewater is often disposed of by injection into deep wells. The injection of wastewater deep into the subsurface can cause earthquakes that are large enough to be felt and may cause damage.  Only in very rare cases does fracking cause small earthquakes, but they are almost always too small to be a safety concern.  Of more than 150,000 Class II injection wells in the United States, roughly 40,000 are waste fluid disposal wells from oil and gas operations.  Only a small fraction of these disposal wells have induced earthquakes that are large enough to be of concern to the public.  Of the case histories for which there is a scientific consensus that an injection operation induced earthquakes, the largest are just above magnitude 5. USGS scientists have investigated a recent sharp increase in the number of magnitude 3 and larger earthquakes in the midcontinent of the United States. These earthquakes are large enough to be felt by many people but are small enough that they rarely cause damage.  The average number of earthquakes occurring per year of M3 or greater increased starting in 2001, culminating in 2008-2011 with a six-fold increase over 20th century levels.  Nearly half of these earthquakes are occurring in areas where hydraulic fracturing, and hence wastewater disposal, is known to be occurring.

BIO:  William Leith, Ph.D. is the Senior Science Advisor for Earthquake and Geologic Hazards at the U. S. Geological Survey.  In this position, he oversees the Earthquake Hazards, Geomagnetism and Global Seismographic Network Programs.  Bill joined the USGS in 1986, after receiving a doctoral degree in seismology and geology from Columbia University, and a bachelor’s degree from the University of California at Berkeley. He served USGS as Chief of the USGS Special Geologic Studies Group from 1990-2001, as Senior Technical Advisor to the Assistant Secretary of State for Verification and Compliance, from 2001-2003, as the Coordinator of the Advanced National Seismic System from 2003-2012, and as USGS Acting Associate Director in 2010-2011.  Bill has over 100 publications in the areas of seismology, geology, engineering geology, tectonics, and the applications of these subjects to earthquake safety, response and engineering, as well as to nuclear weapons testing and test monitoring, treaty verification and compliance assessments.

Meeting Room and Dining Arrangements: We now meet in the glassed-in room at the back of the main dining room—The Fife and Drum. We order individually from the Club menu, which has a nice variety of dinner offerings. We pay a single bill (I pay it with my Officers Club credit card), so we collect at least $25 from each diner with the agreement, that if one orders more than $20 in food and drink, he adds the amount over $20 to his contribution. The $5 overcharge goes to the Room Fee, Tax, Gratuity, and the Speaker’s Dinner. We collect on the Honor System. We did this throughout the last year, and it worked well. This room change and use of the menu have greatly reduced the loss that we have incurred in the past for having fewer than 20 people dining, and the change has preserved the viability of using the Officers Club for our meetings.

Reception at 6:00. Order Dinner at 7:00. Talk at 8:30 PM. Please note that the meal orders will be taken at 7:00. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.jbmhhmwr.com/index/Maps_and_Directions.html). Reservations are not necessary, however, we need a head count, so, if you wish to attend dinner ($25), please inform Bob Fraser at 540-888-3001 or via E-mail at fraser.robert@comcast.net.If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email tofraser.robert@comcast.net.