Category: "Magnitude Errors"

EGS Catalog Geysers Magnitude Errors

January 3rd, 2015
January 3rd, 2015 The Northern California Earthquake Data Center hosts several earthquake catalogs, including the the northern California earthquake catalogs of the USGS and BSL, the worldwide earthquake catalog of the ANSS, and the Enhanced Geothermal… more »

Discrepancy in magnitude from database search

June 14th, 2004
We have discovered an inconsistency between the magnitudes reported in the new database search of the UC Berkeley earthquake catalogs ( http://www.ncedc.org/db/Search/PI/dbselect.html) and the older, flat file search (… more »

Revision of NCSN Catalog

April 20th, 1997
April 29, 1997 On April 29, 1997, the USGS Northern California Seismic Network (NCSN) revised the format and relocated the entire earthquake catalog at the Northern California Earthquake Data Center. We undertook the catalog revision for the following… more »

Magnitude change in UC Berkeley Earthquake Catalog

February 8th, 1995
February 8, 1995 The UC Berkeley Seismological Laboratory recently discovered a bug in the program used to compute earthquake magnitudes in the UCB catalog. Under certain conditions some station corrections were not always applied to the magnitude… more »

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