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NCEDC archives continuous BDSN data for the 2003/12/22 San Simeon Earthquake

January 28, 2004

The NCEDC has archived 7 days of continuous high frequency data from the BDSN network for the days surrounding the magnitude 6.5 San Simeon Earthquake of December 22, 2003.

The NCEDC normally archives continuous 20 Hz and lower data channnels (BHx, LHx, VHx, and UHx) as well as triggered high-rate (HHx and HLx) data channels from the BDSN (BK network) broadband and strong motion instruments. However, in response to users' interest in this earthquake and the possibility of induced seismicity elsewhere in other areas, the NCEDC had archived continuous data from all data channels for the entire BDSN network for the 7 days period spanning 2003/12/21 - 2003/12/27 (2003.355 - 2003.361).

Due to an extented telemetry problem at Parkfield, some of the data channels from the PKD station may be either missing or available in triggered mode during this time.

The NCEDC is a joint project of the University of California, Berkeley and the USGS. Please send us email at or fill out our comments form if you have questions or comments about these changes.