Earthquake Hazards Program


This is a subset of our downloadable software for earthquake research. USGS uses GitHub for all new software development, as well as open sourcing older software as time allows. For a comprehensive listing of all available software, see how our applications work, and to collaborate with us, please go to USGS GitHub.

Filter Total Items: 36
Date published: March 6, 2019


CLUSTER2000 recognizes clusters in space-time in an earthquake catalog.

Date published: March 6, 2019

3D Focal Mechanisms

3D Focal Mechanisms is a tool for viewing earthquake focal mechanism symbols three dimensionally.

Date published: March 6, 2019

3D Velocity Modeling

Fortran code (VMS compatible) for 3-D velocity model determination and hypocentral location with local earthquake data. 

Date published: January 29, 2018

SeismoTectonic Regime Earthquake Calculator (STREC)

Automatically determines the earthquake type (subduction zone interface, active crustal shallow, stable continental region, etc.) and the earthquake focal mechanism.

Date published: February 2, 2017

PRISM software: Processing and Review Interface for Strong Motion Data

PRISM is designed to be used for automatically processing raw strong-motion acceleration time series to produce compatible acceleration, velocity and displacement time series, acceleration, velocity and displacement response spectra, Fourier amplitude spectra, and standard earthquake-engineering intensity measures.

Date published: July 7, 2016

StrongMotion Fetch

Provides functionality to download and/or process strong motion data from various networks (Japan, New Zealand, IRIS, etc.) and save the peak ground motions in either ShakeMap "station" XML format or spreadhsheet format.

Date published: October 1, 2015


An application for automating ShakeMap delivery to critical users and for facilitating notification of shaking levels at user-selected facilities.

Date published: March 6, 2015

Graizer-Kalkan (2015) Ground Motion Prediction Equation

Graizer-Kalkan (2015) ground motion prediction equation (GMPE) is designed to predict peak-ground acceleration and 5% damped pseudo-spectral acceleration response ordinates for shallow-crustal continental earthquakes to be used in earthquake-engineering applications including probabilistic and deterministic seismic hazard analyses.

Date published: December 31, 2010

Risk-Targeted Ground Motion Calculator

This web application can be used to calculate risk-targeted ground motion values in accordance with “Method 2” of 2010 ASCE 7 Standard Section

Date published: January 29, 2007


VISCO1D-v3 is a program package to calculate quasi-static deformation on a layered spherical Earth from a specified input source (fault plane parameters) at specified points on the surface or at depth.

Date published: January 1, 1992

SeisRisk III

Seisrisk III is the last published version of a series of programs used to produce probabilistic earthquake ground motion hazard maps for the United States from 1972 to 1992.

Date published: September 29, 1991

Slick Package

The slick package uses fault slip data (either field observations or from focal mechamism) to find the stress tensor that best explains the observations. Inputs are the orientation and slip direction of a set of fault planes.