Category: "Magnitude"

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 »

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 »

Calpine/LBL Geysers data added to the NCEDC

April 3rd, 2004
The NCEDC is pleased to announce the availability of seismic phase and waveform data from the Calpine/Lawrence Berkeley Labs seismic network that monitors seismicity in the vicinity of the Geysers geothermal field. The phase data begins 2003/04/04.… more »

Earthquake Catalog Search and Map

January 8th, 2003
January 8, 2003 In response to requests from many teachers, the NCEDC has created an experimental earthquake catalog search which provides seismicity maps as well as lists of earthquakes. The simplified search allows a user to select a catalog and one… more »

Contact us: ncedcinfo@ncedc.org
NCEDC blog (News and Info)
Site Map | Privacy
Copyright © 2016 UC Regents