Category: "Bugs"

Bug corrected in building SEED volumes at the NCEDC

March 26th, 2008
March 26th, 2008 The NCEDC has discovered and has corrected a bug in its procedure that create SEED volumes from data at the NCEDC. Under certain circumstances, when users requested multiple segments of data for the same channel and day, the data… more »

Minor Data Formatting Error Corrected at the NCEDC

November 23rd, 2002
On November 23, 2002, the NCEDC discovered a minor data formatting error in some the MiniSEED and SEED data for days 2002/11/17 through 2002/11/23 (days 2002.321 through 2002.327). The error is not serious, and does not affect any data values. A… more »

NCSN Byteorder problem resolved

October 20th, 1999
October 20, 1999 We have corrected the byte order problem that was detected earlier this year in a number of NCSN grm (waveform) files at the NCEDC. See the announcement: Byteorder problem detected in some NCSN waveform files for details. A few (~… 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 »

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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