Category: "USGS Northern California Seismic Network (NCSN)"

NCSN data available in SEED format

November 11th, 2004
November 11, 2004 The NCEDC is very pleased to announce the availability of NCSN event waveform data in SEED format. As a result, NCSN waveform data recorded since 3/1984* and associated metadata are now available through NCEDC tools such as:… more »

Changes to Northern California earthquake catalog search

November 21st, 2002
November 21, 2002 Today the NCEDC implemented modifications to eqselect and catlist, programs which search and reformat earthquake catalogs. These programs are used by the Web catalog search as well as by users with research accounts. The changes will… more »

EVT_FAST system provides access to NCSN waveform data

November 16th, 2001
The USGS Northern California Seismic Network (NCSN) has recorded seismic waveforms for events in northern California from 1984 through present time. These data are archived at the NCEDC, and are now available to users via the EVT_FAST automated event… more »

Byteorder problem detected in some NCSN waveform files

March 12th, 1999
We recently discovered that we loaded 33,933 grm files onto the NCEDC in the WRONG BYTE ORDER. These events were inadvertently stored in VAX byte order instead of Sun byte order. The list of eventids can be found in the file… 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 »

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