National Seismic Hazard Mapping Project (NSHMP) Earthquake Catalogs
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README.md

National Seismic Hazard Mapping Project (NSHMP) Earthquake Catalogs

With each release or update of a National Seismic Hazard Model (NSHM), a variety of earthquake catalogs are compiled and subsequently processed to remove duplicate, dependent (foreshocks and aftershocks), and anthropogenic events. Gridded seismicity source models in hazard calculations are derived from final, filtered catalogs. The tables below outline the processing steps applied to each catalog available in this repository.

2014 NSHM Catalogs

Details of the earthquake catalogs used in constructing the 2014 NSHM, by file. For 2014, anthropogenic events are classified as mining-related and/or explosions (M&E), or potentially fluid induced (PFI). Declustered catalogs (dependent events removed) only include M ≥ 2.5 events.

Name Region Duplicate Dependent Anthro. M&E Anthro. PFI
2014_emm.c2 CEUS
2014_emm.c3 CEUS
2014_emm.c4 CEUS
2014_wmm.c2 WUS
2014_wmm.c3 WUS
2014_wmm.c4 WUS

= events included
= events deleted
WUS = Western US
CEUS = Central & Eastern US

2008 NSHM Catalogs

Details of the earthquake catalogs used in constructing the 2008 NSHM, by file.

Name Region Duplicates Aftershocks Anthropogenic Notes
emb.c_nd CEUS 1
emb.cc CEUS 2
wmm.c_nd WUS 1
wmm.cc WUS 3

= events included
= events deleted
WUS = Western US
CEUS = Central & Eastern US

1 = Explosions and mining-related events included
2 = mbLg ≥ 3
3 = Mw ≥ 4