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.
ShakeMap v4 Software
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.
Point-source to finite-fault distance conversions
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.
SLAMMER - Seismic Landslide Movement Modeled using Earthquake Records
SLAMMER is a Java program that facilitates performing a variety of sliding-block analyses to evaluate seismic slope performance.
USGS Twitter Earthquake Dispatch (@USGSted)
@USGSted (USGS Twitter Earthquake Dispatch) distributes Twitter alerts for earthquakes worldwide with magnitudes of 5.5 and above. When citizens feel shaking activity, they often use the popular social media application, Twitter, to "tweet" what they are experiencing.
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 18.104.22.168.
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.