Some earthquake software

While I was preparing the last entry, I came across some software available through the USGS web pages.

Note that FORTRAN lives!

These are:

1. 3D Focal Mechanisms - a tool for viewing earthquake focal mechanism symbols three dimensionally
2. 3D velocity modeling
3. Cleanstrain - a program to process strainmeter data.
4. CLUSTER2000 - recognizes clusters in space-time in an earthquake catalog
5. Coulomb 3 - designed to investigate Coulomb stress changes on mapped faults and earthquake nodal planes
6. FPFIT - a Fortran program that computes double-couple fault plane solutions from P-wave first motion data
7. Ground Motion Parameter Calculator
8. HASH - a Fortran 77 code that computes double-couple earthquake focal mechanisms from P-wave first motion polarity observations
9. HypoDD - a Fortran computer program package for relocating earthquakes with the double-difference (DD) algorithm
10. HYPOINVERSE2000 - determines earthquake locations and magnitudes from seismic network data like first-arrival P and S arrival times, amplitudes and coda durations
11. MacR1D - a one-dimensional seismic travel-time calculator for Macintosh
12. MacRay - a general purpose two-dimensional seismic ray-tracer for Macintosh
13. OpenSHA - an effort to develop object-oriented, web- & GUI-enabled, open-source, and freely available code for conducting Seismic Hazard Analyses
14. PQLX - open-source software system for evaluating seismic station performance and data quality
15. Probabilistic Seismic Hazard Calculation Software
16. Quake Data Distribution System (QDDS) - provides a method for distributing earthquake data over the Internet in near-real time
17. The Quake Data Merge Real Time Merged Catalog (QDM) software
18. SATSI (Spatial And Temporal Stress Inversion) - inverts focal mechanism data for a spatially and/or temporally varying stress field
19. ShakeCast - delivers maps of areas affected by an earthquake
20. Slick Package - uses fault slip data (either field observations or from focal mechanism) to find the stress tensor that best explains the observations
21. Slope Performance During an Earthquake