Earthquake Hazards

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Filter Total Items: 1,637
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Year Published: 2019

The LArge-n Seismic Survey in Oklahoma (LASSO) experiment

In 2016, the U.S. Geological Survey deployed more than 1,800 vertical-component nodal seismometers in Grant County, Oklahoma to study induced seismic activity associated with production of the Mississippi Limestone Play. The LArge-n Seismic Survey in Oklahoma (LASSO) array operated for approximately one month, covering a 25-km-by-32-km region with...

Dougherty, S.; Cochran, Elizabeth S.; Harrington, R. M.
Dougherty, S.L., Cochran, E.S., and Harrington, R.M. (2019). The LArge-n Seismic Survey in Oklahoma (LASSO) Experiment, Seismological Research Letters, 90 (5): 2051-2057, doi:10.1785/0220190094.

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Year Published: 2019

Status of three-dimensional geological mapping and modeling activities in the U.S. Geological Survey

The U.S. Geological Survey (USGS), created in 1879, is the national geological survey for the United States and the sole science agency within its cabinet-level bureau, the Department of the Interior. The USGS has a broad mission, including: serving the Nation by providing reliable scientific information to describe and understand the Earth;...

Sweetkind, Donald; Graymer, Russell; Higley, D.K.; Boyd, Oliver S.

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Year Published: 2019

The HayWired earthquake scenario—Societal consequences

The HayWired Earthquake Scenario—Societal Consequences is the third volume of U.S. Geological Survey (USGS) Scientific Investigations Report 2017–5013, which describes the HayWired scenario, developed by USGS and its partners. The scenario is a hypothetical yet scientifically realistic earthquake sequence that is being used to better understand...

Detweiler, Shane T.; Wein, Anne M.
Detweiler, S.T., and Wein, A.M., eds., The HayWired earthquake scenario—Societal consequences: U.S. Geological Survey Scientific Investigations Report 2017–5013–R–W, https://doi.org/10.3133/sir20175013V3.

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Year Published: 2019

The 30 November 2018 Mw7.1 Anchorage Earthquake

The Mw7.1 47-km deep earthquake that occurred on 30 November 2018 had deep societal impacts across southcentral Alaska and exhibited phenomena of broad scientific interest. We document observations that point to future directions of research and hazard mitigation. The rupture mechanism, aftershocks, and deformation of the mainshock are consistent...

West, Michael E.; Bender, Adrian; Gardine, Matthew; Gardine, Lea; Gately, Kara; Haeussler, Peter; Hassan, Wael; Meyer, Franz; Richards, Cole; Ruppert, Natalia; Tape, Carl; Thornley, John; Witter, Robert

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Year Published: 2019

Stormquakes

Seismic signals from ocean-solid Earth interactions are ubiquitously recorded on our planet. However, these wavefields are typically incoherent in most frequency bands limiting their utilization for understanding ocean dynamics or solid Earth properties. In contrast, we find that during large storms such as hurricanes and Nor’easters the...

Fan, Wenyuan; McGuire, Jeffrey; de Groot-Hedlin, C. D.; Hedlin, M. A. H.; Coats, S.; Fiedler, J. W.

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Year Published: 2019

Ensembles of ETAS models provide optimal operational earthquake forecasting during swarms: Insights from the 2015 San Ramon, California swarm

Earthquake swarms, typically modeled as time-varying changes in background seismicity that are driven by external processes such as fluid flow or aseismic creep, present challenges for operational earthquake forecasting. While the time decay of aftershock sequences can be estimated with the modified Omori law, it is difficult to forecast the...

Llenos, Andrea L.; Michael, Andrew J.

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Year Published: 2019

Characterizing large earthquakes before rupture is complete

Whether large and very large earthquakes are distinguishable from each other early on in the rupture process has been a subject often debated over the past several decades. Studies have shown that the frequency content of radiated seismic energy in the first few seconds of an earthquake scales with the final magnitude of the event, implying...

Melgar, Diego; Hayes, Gavin P.

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Year Published: 2019

Global earthquake response with imaging geodesy: recent examples from the USGS NEIC

The U.S. Geological Survey National Earthquake Information Center leads real-time efforts to provide rapid and accurate assessments of the impacts of global earthquakes, including estimates of ground shaking, ground failure, and the resulting human impacts. These efforts primarily rely on analysis of the seismic wavefield to characterize the...

Barnhart, William D.; Hayes, Gavin P.; Wald, David J.

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Year Published: 2019

National earthquake information center strategic plan, 2019–23

Executive SummaryDamaging earthquakes occur regularly around the world; since the turn of the 20th century, hundreds of earthquakes have caused significant loss of life and (or) millions of dollars or more in economic losses. While most of these did not directly affect the United States and its Territories, by studying worldwide seismicity we can...

Hayes, Gavin P.; Earle, Paul S.; Benz, Harley M.; Wald, David J.; Yeck, William L.
Hayes, G.P., Earle, P.S., Benz, H.M., Wald, D.J., and Yeck, W.L., 2019, National Earthquake Information Center strategic plan, 2019–23: U.S. Geological Survey Circular 1457, 17 p., https://doi.org/10.3133/cir1457.

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Year Published: 2019

κ0 and broadband site spectra in Southern California from source model-constrained inversion

Ground-motion modeling requires accurate representation of the earthquake source, path, and site. Site amplification is often modeled by VS30, the time-averaged shear-wave velocity of the top 30 meters of the Earth’s surface, though recent studies find that its ability to accurately predict site effects varies. Another measure of the site is κ0,...

Klimasewski, Alexis; Sahakian, Valerie J.; Baltay, Annemarie S.; Boatwright, John; Fletcher, Jon Peter; Baker, Lawrence

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Year Published: 2019

Temporal patterns of induced seismicity in Oklahoma revealed from multi-station template matching

Over the past decade, Oklahoma became the most seismically active region of the mid-Continental United States as a result of industry operations. However, seismic network limitations and completeness of earthquake catalogs have restricted the types of analyses that can be performed. By applying multi-station template matching on the 23,889...

Skoumal, Robert; Brudzinski, Michael R.; Currie, Brian S.; Ries, Rosamiel

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Year Published: 2019

Characterizing and imaging sedimentary strata using depth-converted spectral ratios: An example from the Atlantic Coastal Plain of the Eastern U.S.

Unconsolidated, near-surface sediments can have a profound influence on the amplitudes and frequencies of ground shaking during earthquakes, and these effects should be accounted for when using amplitude observations for seismic hazard assessments. This study explores methods to use teleseismic arrivals recorded on linear receiver arrays to...

Pratt, Thomas L.