Earthquake Hazards Program

Data and Tools

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

Filter Total Items: 245
Date published: December 5, 2019

Data Release for the 2018 Update of the U.S. National Seismic Hazard Model

The 2018 Update of the U.S. National Seismic Hazard Model defines the potential for earthquake ground shaking for various probability levels across the conterminous United States and is applied in seismic provisions of building codes, insurance rate structures, risk assessments, and other public policy. The updated model represents an assessment of the best available science in earthquake h...

Date published: December 4, 2019

Latest Earthquakes Map and List

View most recent events or search for past earthquakes. Optimized for mobile and desktop.

Date published: December 2, 2019

Did You Feel It?

Feel an earthquake? Report it here. View reported earthquakes in your area.

Date published: November 19, 2019

3D Geologic Framework for use with the U.S. Geological Survey National Crustal Model, Phase 1: Western United States

A 3D geologic framework is presented here as part of the U.S. Geological Survey National Crustal Model for the western United States, which will be used to improve seismic hazard assessment. The framework is based on 1:250,000 to 1:1,000,000-scale state geologic maps and depths of multiple subsurface unit boundaries. The geology at or near the Earth’s surface is based on publi

Date published: October 30, 2019

Grids in support of the U.S. Geological Survey Thermal Model for Seismic Hazard Studies

A 3D temperature model is constructed in order to support the estimation of physical parameters within the USGS National Crustal Model. The crustal model is defined by a geological framework consisting of various lithologies with distinct mineral compositions. A temperature model is needed to calculate mineral density and bulk and shear modulus as a function of position within the crust. These...

Date published: October 7, 2019

Data Release for Additional Period and Site Class Data for the 2018 National Seismic Hazard Model for the Conterminous United States

The updated 2018 National Seismic Hazard Model includes new ground motion models, aleatory uncertainty, and soil amplification factors for the central and eastern U.S. and incorporates basin depths from local seismic velocity models in four western U.S. (WUS) urban areas. These additions allow us, for the first time, to calculate probabilistic seismic hazard curves for an expanded set

Date published: September 3, 2019

Data release for "Shear Failure of a Granite Pin Traversing a Sawcut Fault"

Fault heterogeneities such as bumps, bends, and stepovers are commonly observed on natural faults but challenging to recreate under controlled laboratory conditions. We study deformation and microseismicity of a 76 mm-diameter Westerly granite cylinder with a sawcut fault with known frictional properties. An idealized asperity is added by emplacing a precision-ground 21 mm-diameter solid gran...

Date published: April 24, 2019

Modified Mercalli Intensity based on the average of horizontal spectral response acceleration for 1.0-second period and peak ground acceleration, with 1-percent probability of exceedance in 1 year

A one-year seismic hazard forecast for the Central and Eastern United States, based on induced and natural earthquakes, has been produced by the U.S. Geological Survey. The model assumes that earthquake rates calculated from several different time windows will remain relatively stationary and can be used to forecast earthquake hazard and damage intensity for the year 2018. This assessment is...

Date published: April 24, 2019

Modified Mercalli Intensity based on peak ground acceleration, with a 10% probability of exceedance in 50 years

A seismic hazard model for South America, based on a smoothed (gridded) seismicity model, a subduction model, a crustal fault model, and a ground motion model, has been produced by the U.S. Geological Survey. These models are combined to account for ground shaking from earthquakes on known faults as well as earthquakes on un-modeled faults. This data set represents the results of calculations...

Date published: April 24, 2019

1.0-second spectral response acceleration (5% of critical damping) with a 1% probability of exceedance in 1 year

A one-year seismic hazard forecast for the Central and Eastern United States, based on induced and natural earthquakes, has been produced by the U.S. Geological Survey. The model assumes that earthquake rates calculated from several different time windows will remain relatively stationary and can be used to forecast earthquake hazard and damage intensity for the year 2018. This assessment is...

Date published: January 1, 2019

Spatially averaged coherencies (krSPAC) and Rayleigh effective-mode modeling of microtremor data from asymmetric arrays

The datasets for this investigation consist of microtremor array data collected at sites in San Jose, California, Pleasanton, California, and synthetic microtremor array data created as part of a blind shear-wave velocity modeling study as part of the Third International Symposium on the Effects of Surface Geology on Seismic Motion (ESG2006), Grenoble, France, 30 August - 1 Sept

Date published: January 1, 2019

Table of photograph metadata and links to full-resolution photographs taken at observation stations by post-earthquake reconnaissance teams, Mw 6.0 South Napa Earthquake of August 24, 2014

This product is the result of a comprehensive compilation of site-specific ground photographs taken where tectonic faulting and ground failure produced visible deformation that fractured and disturbed the ground surface. The resultant data is distributed as a tab-delimited text file. All post-earthquake photographs taken by investigators working for public agencies are in the public domain,...