Publications
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Overview of the ARkStorm scenario Overview of the ARkStorm scenario
The U.S. Geological Survey, Multi Hazards Demonstration Project (MHDP) uses hazards science to improve resiliency of communities to natural disasters including earthquakes, tsunamis, wildfires, landslides, floods and coastal erosion. The project engages emergency planners, businesses, universities, government agencies, and others in preparing for major natural disasters. The project also...
Authors
Keith Porter, Anne Wein, Charles N. Alpers, Allan Baez, Patrick L. Barnard, James Carter, Alessandra Corsi, James Costner, Dale Cox, Tapash Das, Mike Dettinger, James Done, Charles Eadie, Marcia Eymann, Justin Ferris, Prasad Gunturi, Mimi Hughes, Robert Jarrett, Laurie Johnson, Hanh Dam Le-Griffin, David Mitchell, Suzette Morman, Paul Neiman, Anna Olsen, Suzanne Perry, Geoffrey Plumlee, Martin Ralph, David Reynolds, Adam Rose, Kathleen Schaefer, Julie Serakos, William Siembieda, Jonathan D. Stock, David Strong, Ian Sue Wing, Alex Tang, Pete Thomas, Ken Topping, Chris Wills, Lucile Jones
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Earthquake Hazards Program, Science Application for Risk Reduction, Geologic Hazards Science Center, Pacific Coastal and Marine Science Center, Big Sur Landslides, Reducing Risk, San Francisco Bay and Sacramento-San Joaquin Delta Estuary
Cyclic spattering, seismic tremor, and surface fluctuation within a perched lava channel, Kilauea Volcano Cyclic spattering, seismic tremor, and surface fluctuation within a perched lava channel, Kilauea Volcano
In late 2007, a perched lava channel, built up to 45 m above the preexisting surface, developed during the ongoing eruption near Pu‘u ‘Ō‘ō cone on Kīlauea Volcano’s east rift zone. The lava channel was segmented into four pools extending over a total of 1.4 km. From late October to mid-December, a cyclic behavior, consisting of steady lava level rise terminated by vigorous spattering and...
Authors
Matthew R. Patrick, Tim R. Orr, David C. Wilson, David C. Dow, R. Freeman
Electrical properties of methane hydrate + sediment mixtures Electrical properties of methane hydrate + sediment mixtures
As part of our DOE-funded proposal to characterize gas hydrate in the Gulf of Mexico using marine electromagnetic methods, a collaboration between SIO, LLNL, and USGS with the goal of measuring the electrical properties of lab-created methane (CH4) hydrate and sediment mixtures was formed. We examined samples with known characteristics to better relate electrical properties measured in...
Authors
Wyatt L. Du Frane, Laura A. Stern, Karen A. Weitemeyer, Steven Constable, Jeffery J. Roberts
Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes
The value of slope stability analyses for gaining insight into the geologic conditions that would facilitate the growth of gully alcoves on Mars is demonstrated in Gasa crater. Two-dimensional limit equilibrium methods are used in conjunction with high-resolution topography derived from stereo High Resolution Imaging Science Experiment (HiRISE) imagery. These analyses reveal three...
Authors
Chris H. Okubo, Livio L. Tornabene, Nina L. Lanza
Regional-scale stratigraphy of surface units in Tyrrhena and Iapygia Terrae, Mars: Insights into highland crustal evolution and alteration history Regional-scale stratigraphy of surface units in Tyrrhena and Iapygia Terrae, Mars: Insights into highland crustal evolution and alteration history
The compositional, thermophysical and geologic characteristics of surface units in Iapygia and Tyrrhena Terra (60°E–100°E, 0°–30°S) provide new insights into the compositional stratigraphy of the region. Intercrater plains are dominated by two surface units. The older unit (unit 1) is deficient in olivine and more degraded and likely consists of a mixture of impact, volcanic and...
Authors
A. Deanne Rogers, Robin L. Fergason
Deep rock damage in the San Andreas Fault revealed by P- and S-type fault-zone-guided waves Deep rock damage in the San Andreas Fault revealed by P- and S-type fault-zone-guided waves
Damage to fault-zone rocks during fault slip results in the formation of a channel of low seismic-wave velocities. Within such channels guided seismic waves, denoted by Fg, can propagate. Here we show with core samples, well logs and Fg-waves that such a channel is crossed by the SAFOD (San Andreas Fault Observatory at Depth) borehole at a depth of 2.7 km near Parkfield, California, USA...
Authors
William L. Ellsworth, Peter E. Malin
Newberry Volcano—Central Oregon’s sleeping giant Newberry Volcano—Central Oregon’s sleeping giant
Hidden in plain sight, Oregon's massive Newberry Volcano is the largest volcano in the Cascades volcanic arc and covers an area the size of Rhode Island. Unlike familiar cone-shaped Cascades volcanoes, Newberry was built into the shape of a broad shield by repeated eruptions over 500,000 years. About 65,000 years ago a major explosion and collapse event created a large volcanic...
Authors
Julie M. Donnelly-Nolan, Wendy K. Stovall, David W. Ramsey, John W. Ewert, Robert A. Jensen
Long-term biases in geomagnetic K and aa indices Long-term biases in geomagnetic K and aa indices
Analysis is made of the geomagnetic-activity aa index and its source K-index data from groups of ground-based observatories in Britain, and Australia, 1868.0–2009.0, solar cycles 11–23. The K data show persistent biases, especially for high (low) K-activity levels at British (Australian) observatories. From examination of multiple subsets of the K data we infer that the biases are not
Authors
Jeffrey J. Love
Landslide inventories: The essential part of seismic landslide hazard analyses Landslide inventories: The essential part of seismic landslide hazard analyses
A detailed and accurate landslide inventory is an essential part of seismic landslide hazard analysis. An ideal inventory would cover the entire area affected by an earthquake and include all of the landslides that are possible to detect down to sizes of 1–5 m in length. The landslides must also be located accurately and mapped as polygons depicting their true shapes. Such mapped...
Authors
E. L. Harp, D. K. Keefer, H.P. Sato, H. Yagi
Don't forget about the Christchurch earthquake: Lessons learned from this disaster Don't forget about the Christchurch earthquake: Lessons learned from this disaster
In the aftermath of the devastating magnitude-9.0 earthquake and tsunami that struck the Tohoku region of Japan on March 11, attention quickly turned away from a much smaller, but also highly destructive earthquake that struck the city of Christchurch, New Zealand, just a few weeks earlier, on Feb. 22. Both events are stark reminders of human vulnerability to natural disasters and...
Authors
Michael W. Hamburger, Walter D. Mooney
Twitter earthquake detection: Earthquake monitoring in a social world Twitter earthquake detection: Earthquake monitoring in a social world
The U.S. Geological Survey (USGS) is investigating how the social networking site Twitter, a popular service for sending and receiving short, public text messages, can augment USGS earthquake response products and the delivery of hazard information. Rapid detection and qualitative assessment of shaking events are possible because people begin sending public Twitter messages (tweets) with...
Authors
Paul S. Earle, Daniel C. Bowden, Michelle R. Guy