Please join us for the September 13, 2018 meeting of the Potomac Geophysical Society at 7:00 p.m. at the DoubleTree by Hilton McLean Tysons, 1960 Chain Bridge Road, 22102. This location is within one-half mile of the Tysons Corner Metro station, near I-495, and has free parking available. Our private meeting room is located in the back of the Orchard Cafe restaurant on the second floor of the hotel. The optional dinner cost will be discounted to $30 for members in good standing (have paid dues) and students, and $40 for non-members, and is inclusive of iced tea, coffee, tax and gratuity. Members and guests may attend the presentation after dinner for no charge; we estimate that the presentation will begin at 8:15 p.m. For attendees who arrive early, social time will be held in O’Malley’s Pub on the first floor of the DoubleTree by Hilton hotel. Drinks may also be purchased in the private meeting room on a cash basis.
If you plan on attending, please RSVP to firstname.lastname@example.org by noon Monday, September 10. We encourage you to spread the word about our meetings to your colleagues and students. As always, guests are definitely welcomed. We hope to see you there! A flyer is attached.
Social Time: 6:00-7:00 p.m. O’Malley’s Pub, first floor DoubleTree by Hilton
Dinner: 7:00-8:15 p.m. Peachtree Room, Orchard Cafe, second floor DoubleTree by Hilton
House building, subdivision development and farming in (and below) the active volcanic rift zones of Kilauea and Mauna Loa, island of Hawaii: What could possibly go wrong?
by Michael Ryan, The Magma Physics Project – Hilo
Since May 3rd, 2018, Kilauea has been erupting from two sites with a pattern and vigor not seen in the past 200 years. Summit eruptions are characterized by repeated caldera collapse events that send magma reservoir roof blocks into the molten reservoir below, triggering M 5.1 to 5.4 earthquakes and sending ash and ejecta skyward and surges of magma into east rift zone conduits. Some 38 km distant, voluminous lava eruptions within the lower east rift zone have devastated numerous communities, laying waste to houses, farms and coastal resorts. These distant and seemingly different eruptions are intimately connected and the talk will integrate their several interrelationships. Overlaid on Kilauea since Hawaiian statehood, is a settlement pattern that generates profound and growing volcanic risk. For Kilauea, the eruption impacts are currently being addressed by the USGS’s HVO, by the County of Hawaii Civil Defense, by the National Park Service, by FEMA and by the Red Cross. Both eruptions have impacted a large community of rattled or displaced citizens. In addition, Mauna Loa is currently slowly building towards eruption and it too contains rift zones that loom over settled areas, and contribute towards significant and now potentially more dangerous volcanic risk.
Dr. Michael P. Ryan Ph.D. is a research volcanologist with the Magma Physics Project in Hilo, Hawaii. He has 45 years of experience in working on active volcanoes in Hawaii, Iceland, Japan and the high Cascades of Washington & Oregon. These settings represent oceanic volcanism as well as mid-ocean ridge, island arc and continental arc magmatism. His interests are in the processes and pathways of magma migration: from Earth’s mantle and subduction zones upward through the crust and into and within volcanic centers. Current work includes the solitary wave mechanics of magma ascent beneath Kilauea and Mt. St. Helens, the mechanics & dynamics of the on-going eruptions of Kilauea’s summit and east rift zone and the long-term evolutionary trends of volcanism in Hawaii.