Software

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.

HYPOINVERSE2000 determines earthquake locations and magnitudes from seismic network data like first-arrival P and S arrival times, amplitudes and coda durations.

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

Bulk access via scripts, programs, and tools for obtaining specific products from ComCat (the earthquake catalog).

These programs are an implementation of the Direct Green’s Function method described by Friederich and Dalkolmo (1995) and Dalkolmo (1993).

est_noise is a time-series analysis program that allows the user to fit various, standard functions to their data (rates, offsets, rate-changes, sinusoidals, exponentials, and/or user-defined functions) and simultaneously quantifies the amount of temporal correlation in the time-series data.

FPFIT is a Fortran program that computes double-couple fault plane solutions from P-wave first motion data using a grid search method.

Cleanstrain+ is a program to process strainmeter data.

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

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

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