Category: "Earthquake Catalogue"

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 »

Double Difference Locations Now Available

June 2nd, 2014
June 2nd, 2014 The NCEDC is pleased to announce the availability of double difference (DD) hypocenter solutions from 1984 to the present for earthquakes recorded by the Northern California Seismic System (NCSS). The NCSS catalog can be searched via… more »

NCSS event review threshold change

May 27th, 2013
The Northern California Seismic System (NCSS), operated by the US Geological Survey in Menlo Park and UC Berkeley Seismological Laboratory, locates ~20,000 earthquakes per year in the Geysers geothermal region (Figure 1). Since 2007/07/23, when data… more »

Changes to the NCSN/NCEDC catalog

July 18th, 2008
July 18th, 2008 The NCEDC has migrated all NCSN phase, catalog, and waveform information from ASCII files into the CISN database. This migration necessitated the following changes. Formerly the catalog referenced historic events without waveforms for… more »

PG&E seismic data available at the NCEDC

October 20th, 2006
October 16th, 2006 The NCEDC is pleased to announce the availability of seismic phase and waveform data from the Pacific Gas and Electric seismic network that monitors seismicity in the vicinity of the Diablo Canyon nuclear powerplant. The phase data,… more »

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