Publications
Educational Publications
Educational Publications
Selected publications about earthquakes In plain language.
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Exploring GPS observations of postseismic deformation following the 2012 MW7.8 Haida Gwaii and 2013 MW7.5 Craig, Alaska Earthquakes: Implications for viscoelastic Earth structure Exploring GPS observations of postseismic deformation following the 2012 MW7.8 Haida Gwaii and 2013 MW7.5 Craig, Alaska Earthquakes: Implications for viscoelastic Earth structure
The Queen Charlotte-Fairweather Fault (QC-FF) system off the coast of British Columbia and southeast Alaska is a highly active dextral strike-slip plate boundary that accommodates ∼50 mm/yr of relative motion between the Pacific and North America plates. Nine MW ≥ 6.7 earthquakes have occurred along the QC-FF system since 1910, including a MS(G-R)8.1 event in 1949. Two recent earthquakes...
Authors
Katherine Guns, Frederick Pollitz, Thorne Lay, Han Yue
Strength recovery and sealing under hydrothermal conditions Strength recovery and sealing under hydrothermal conditions
While there is significant evidence for healing in natural faults, geothermal reservoirs, and lab experiments, the thermal, hydraulic, mechanical, and chemical interactions that influence healing are poorly understood. We present preliminary results of triaxial slide-hold-slide experiments to constrain rates and mechanisms of healing. Experiments were conducted on gouge composed of...
Authors
Tamara Jeppson, David A. Lockner, Brian Kilgore, Nicholas Beeler, Joshua M. Taron
Creep on the Sargent Fault over the past 50 yr from alignment arrays with implications for slip transfer between the Calaveras and San Andreas Faults, California Creep on the Sargent Fault over the past 50 yr from alignment arrays with implications for slip transfer between the Calaveras and San Andreas Faults, California
The 55‐km‐long Sargent fault connects the creeping Calaveras fault with the locked San Andreas fault through the Santa Cruz Mountains west of Gilroy, California. The position of the Sargent fault between these two faults may have implications for slip transfer and strain accumulation between a creeping and locked fault. The detection and measurement of creep on the Sargent fault would...
Authors
Daniel Mongovin, Belle Philibosian
An International Virtual Workshop on Global Seismology and Tectonics (IVWGST‐2020) An International Virtual Workshop on Global Seismology and Tectonics (IVWGST‐2020)
An International Virtual Workshop on Global Seismology and Tectonics (IVWGST‐2020) was organized by the Geoscience and Technology Division of Council of Scientific and Industrial Research—North East Institute of Science and Technology, Jorhat, India from 14 to 25 September 2020. This workshop predominantly catered to undergraduate, postgraduate, and Ph.D. students, scientists, and...
Authors
Santanu Baruah, Chandan Dey, Prachurjya Borthakur, G. Sastry, Andrew Michael
ShakeMap operations, policies, and procedures ShakeMap operations, policies, and procedures
The US Geological Survey’s ShakeMap is used domestically and globally for post-earthquake emergency management and response, engineering analyses, financial instruments, and other decision-making activities. Recent developments in the insurance, reinsurance, and catastrophe bond sectors link payouts of potentially hundreds of millions of dollars to ShakeMap products. Similarly, building...
Authors
David Wald, Charles Worden, Eric Thompson, Mike Hearne
Holocene depositional history inferred from single-grain luminescence ages in southern California, North America Holocene depositional history inferred from single-grain luminescence ages in southern California, North America
Significant sediment flux and deposition in a sedimentary system are influenced by climate changes, tectonics, lithology, and the sedimentary system's internal dynamics. Identifying the timing of depositional periods from stratigraphic records is a first step to critically evaluate the controls of sediment flux and deposition. Here, we show that ages of single-grain K-feldspar...
Authors
Sourav Saha, Seulgi Moon, Nathan Brown, Edward Rhodes, Katherine M. Scharer, Devin McPhillips, Sally McGill, Bryan Castillo
Streambank erosion and related geomorphic change in Tuolumne Meadows, Yosemite National Park, California Streambank erosion and related geomorphic change in Tuolumne Meadows, Yosemite National Park, California
Landscape change in Tuolumne Meadows, Yosemite National Park, California, was characterized using data derived from four lidar surveys: one airborne survey in 2006 and three terrestrial surveys in 2016, 2017, and 2018. These surveys were used to generate a better quantitative understanding of changes associated with fluvial processes along the reach of the Tuolumne River within Tuolumne...
Authors
Stephen DeLong, Alexandra Pickering, Timothy Kuhn
Teleseismic waves reveal anisotropic poroelastic response of wastewater disposal reservoir Teleseismic waves reveal anisotropic poroelastic response of wastewater disposal reservoir
Connecting earthquake nucleation in basement rock to fluid injection in basal, sedimentary reservoirs, depends heavily on choices related to the poroelastic properties of the fluid-rock system, thermo-chemical effects notwithstanding. Direct constraints on these parameters outside of laboratory settings are rare, and it is commonly assumed that the rock layers are isotropic. With the...
Authors
Andrew Barbour, Nicholas Beeler
The PLUM earthquake early warning algorithm: A retrospective case study of West Coast, USA, data The PLUM earthquake early warning algorithm: A retrospective case study of West Coast, USA, data
The PLUM (Propagation of Local Undamped Motion) earthquake early warning (EEW) algorithm differs from typical source-based EEW algorithms as it predicts shaking directly from observed shaking without first deriving earthquake source information (e.g., magnitude and epicenter). Here, we determine optimal PLUM event detection thresholds for U.S. West Coast earthquakes using two data sets...
Authors
Debi Kilb, Julian Bunn, Jessie Saunders, Elizabeth Cochran, Sarah Minson, Annemarie Baltay Sundstrom, Colin O’Rourke, Mitsuyuki Hoshiba, Yuki Kodera
Evaluation of remote mapping techniques for earthquake-triggered landslide inventories in an urban subarctic environment: A case study of the 2018 Anchorage, Alaska Earthquake Evaluation of remote mapping techniques for earthquake-triggered landslide inventories in an urban subarctic environment: A case study of the 2018 Anchorage, Alaska Earthquake
Earthquake-induced landslide inventories can be generated using field observations but doing so can be challenging if the affected landscape is large or inaccessible after an earthquake. Remote sensing data can be used to help overcome these limitations. The effectiveness of remotely sensed data to produce landslide inventories, however, is dependent on a variety of factors, such as the...
Authors
Sabrina Martinez, Lauren Schaefer, Kate Allstadt, Eric Thompson
A massive rock and ice avalanche caused the 2021 disaster at Chamoli, Indian Himalaya A massive rock and ice avalanche caused the 2021 disaster at Chamoli, Indian Himalaya
On 7 Feb 2021, a catastrophic mass flow descended the Ronti Gad, Rishiganga, and Dhauliganga valleys in Chamoli, Uttarakhand, India, causing widespread devastation and severely damaging two hydropower projects. Over 200 people were killed or are missing. Our analysis of satellite imagery, seismic records, numerical model results, and eyewitness videos reveals that ~27x106 m3 of rock and...
Authors
D. Shugar, Mylene Jacquemart, D. Shean, S. Bhushan, K. Upadhyay, A. Sattar, W. Schwanghart, Sara McBride, M. Van Wyk de Vries, M. Mergili, A. Emmer, C. Deschamps-Berger, M. McDonnell, R. Bhambri, S. Allen, E. Berthier, J.L. Carrivick, J.J. Clague, M. Dokukin, S.A. Dunning, Herbert Frey, S. Gascoin, U. K. Haritashya, C. Huggel, A. Kaab, J.S. Kargel, J.L. Kavanaugh, P. Lacroix, D. N. Petley, S. Rupper, M.F. Azam, S.J. Cook, A.P. Dimri, M. Eriksson, D. Farinotti, J. Fiddes, K.R. Gnyawali, S. Harrison, M.K. Jha, M. Koppes, S. Kumar, S. Leiness, U. Majeed, S. Mai, A. Muhuri, J. Noetzli, F. Paul, I. Rashid, K. Sain, J. Steiner, F. Ugalde, C.S. Watson, M.J. Westoby
A near-real-time model for estimating probability of road obstruction due to earthquake-triggered landslides A near-real-time model for estimating probability of road obstruction due to earthquake-triggered landslides
Coseismic landslides are a major source of transportation disruption in mountainous areas, but few approaches exist for rapidly estimating impacts to road networks. We develop a model that links the U.S. Geological Survey (USGS) near-real-time earthquake-triggered landslide hazard model with Open Street Map (OSM) road network data to rapidly estimate segment-level obstruction risk...
Authors
B.H. Wilson, Kate Allstadt, Eric Thompson