Software

The goal of this project is to update, restructure, and consolidate existing USGS ground-motion processing software to incorporate recent advances from researchers at the USGS, PEER, and others. It will standardize tools for multiple USGS ground-motion products and enable scientists within the USGS and the external community to develop and expand ground-motion datasets used in many...

A three-dimensional compilation of global subduction geometries, separated into regional models for each major subduction zone.

These programs solve the equations of static equilibrium in a spherically layered isotropic medium using a decomposition into spheroidal and toroidal motions.

Strainz17.m is a MATLAB-language function for deriving the best-fitting uniform strain tensor and rigid body rotation as functions of time, based on ground displacement or velocity recordings made on an array of sensors.

Produce approximated finite fault distances and variance corrections given point source information, for example, Repi (epcentral distance) to Rjb (Joyner-Boore distance) or Rrup (closest distance to rupture).

SATSI (Spatial And Temporal Stress Inversion) is a modified version of Michael's (JGR 1984, 1987) code that inverts focal mechanism data for a spatially and/or temporally varying stress field.

A uniform ANSS standard for seismic parametric data.

MacRay is a general purpose two-dimensional seismic ray-tracer for Macintosh.

MacR1D is a one-dimensional seismic travel-time calculator for Macintosh.

Models, Codes and Catalogs used to produce the National Seismic Hazard Maps.

The Product Distribution Layer (PDL) is a USGS platform for receiving earthquake data over the Internet in near-real time.

P PHASEP ICKER is a powerful tool for automatically picking P-phase onsets with high precision without requiring detection interval or threshold settings.