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Data

Realtime monitoring, station, and other various seismic data available for download. Access to data products to view and download.

Filter Total Items: 284

Data from the manuscript: Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults Data from the manuscript: Direct evidence for fluid pressure, dilatancy, and compaction affecting slip in isolated faults

Earthquake instability occurs as a result of strength loss during sliding on a fault. It has been known for over 50 years that fault compaction or dilatancy may cause significant weakening or strengthening by dramatically changing the fluid pressure trapped in faults. Despite this fundamental importance, we have no real understanding of the exact conditions that lead to compaction or...

Data release for effect of cationic species on the friction of clay-bearing faults Data release for effect of cationic species on the friction of clay-bearing faults

Data are time series of clay shearing tests presented in 'Friction in clay-bearing faults increases with the ionic radius of interlayer cations' by Sakuma et al. in Communications Earth & Environment, 2022. Data were used for Figure 1 and Supplementary Figure 8 in that paper. Files contain shear strength as a function of fault slip in laboratory tests for brine-saturated montmorillonite...

Fault Rupture Mapping of the 6 February 2023 Kahramanmaraş, Türkiye, Earthquake Sequence from Satellite Data (ver. 1.1, February 2024) Fault Rupture Mapping of the 6 February 2023 Kahramanmaraş, Türkiye, Earthquake Sequence from Satellite Data (ver. 1.1, February 2024)

This data release contains two datasets that depict fault rupture on the East Anatolian and Çardak faults resulting from the Mw7.8 and Mw7.5 earthquakes in Turkey (Türkiye). It contains two additional datasets that describe satellite imagery coverage and observation gaps. The 6 February 2023 earthquake sequence caused >500 km of combined surface rupture on the primarily left-lateral...

Beryllium-10 concentrations in depth profiles and surface clasts from terrace surfaces near Littlerock Creek, California Beryllium-10 concentrations in depth profiles and surface clasts from terrace surfaces near Littlerock Creek, California

This report summarizes the age-dating results from four terrace surfaces of the Littlerock Creek (map units T3g, T3c, T2, and T1c) that record cumulative strike-slip displacements ranging from 470 to 1080 meters along the Mojave section of the San Andreas Fault. Within this report are detailed the methodology used to collect samples of rock and sediment, determine concentrations of...

St. Louis Geotechnical Database, v2003 St. Louis Geotechnical Database, v2003

The St. Louis area has experienced minor earthquake damage at least 12 times in the past 205 years. The St. Louis metropolitan area, with a population of about 2.8 million, faces earthquake hazard from large earthquakes in the New Madrid and Wabash Valley seismic zones, as well as a closer region of diffuse historical and prehistoric seismicity to its south and east. Also, low...

Shakemap Atlas Composite Dataset for the Conterminous United States from 1906 to 2020 Shakemap Atlas Composite Dataset for the Conterminous United States from 1906 to 2020

Composite of Shakemap Atlas ground motions (PGA and PGV) and intensity calculations at a scale of 10km. Time history at each grid cell and maximum observed/estimated hazards are provided.

Evansville Urban Seismic Hazard Maps, v2010 Evansville Urban Seismic Hazard Maps, v2010

Evansville, Indiana has a dense urban population near faults capable of producing major earthquakes. A high probability of a moderate earthquake in the near future (e.g., a 25–40% probability of a magnitude 6.0 or greater in the next 50 years) from the New Madrid seismic zone, and more moderate probability of a similar-sized earthquake in the Wabash Valley, coupled with relatively low...

Memphis Urban Seismic Hazard Maps, v2008 Memphis Urban Seismic Hazard Maps, v2008

Memphis has a dense urban population near faults capable of producing major earthquakes. A high probability of a moderate earthquake in the near future (e.g., a 25-40% probability of a magnitude 6.0 or greater in the next 50 years) from the New Madrid seismic zone, and relatively low regional attenuation (in other words, seismic waves do damage over a greater area in this region than for...

Data release for spatial and temporal analysis of geologically derived fault slip rates, Cucamonga Fault, California, USA Data release for spatial and temporal analysis of geologically derived fault slip rates, Cucamonga Fault, California, USA

This report summarizes the age-dating results from two alluvial fan surfaces (map units Qyf2 and Qyf3) that are broken by strands of the Cucamonga Fault, in southern California, at Day Canyon and Etiwanda Canyon. Within this report are detailed the methodology used to collect samples of rock and sediment, determine concentrations of cosmogenic beryllium-10 in purified quartz isolated...

Remote survey of fragile geologic features for use as earthquake ground motion constraints, Oregon and Washington, USA Remote survey of fragile geologic features for use as earthquake ground motion constraints, Oregon and Washington, USA

Fragile geologic features (FGFs) are elements of the landscape that are vulnerable to destruction during sufficiently strong earthquake ground shaking. As result, the observation of extant FGFs on the landscape may constrain the maximum intensity of past earthquake shaking. McPhillips and Scharer (2022, Survey of fragile geologic features and their quasi-static earthquake ground motion...

Ground Penetrating Radar Profiles collected in Charleston, SC, in June 2015 for imaging shallow faults Ground Penetrating Radar Profiles collected in Charleston, SC, in June 2015 for imaging shallow faults

This Data Release contains a series of reconnaissance Ground-Penetrating Radar (GPR) profiles collected in 2015 to image potential shallow faulting related to the 1886 M~7 earthquake near Charleston, South Carolina, and any other faults in the area. The data include coordinates for the profiles as .kmz files, and processed GPR data in SEGY format, with both the unmigrated and migrated...
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