Software

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).

A uniform ANSS standard for seismic parametric data.

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.

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

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

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

OpenSHA is an effort to develop object-oriented, web- & GUI-enabled, open-source, and freely available code for conducting Seismic Hazard Analyses (SHA).

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

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

PQLX is open-source software system for evaluating seismic station performance and data quality.

HASH is a Fortran 77 code that computes double-couple earthquake focal mechanisms from P-wave first motion polarity observations, and optionally S/P amplitude ratios.

HypoDD is a Fortran computer program package for relocating earthquakes with the double-difference (DD) algorithm of Waldhauser and Ellsworth (2000).