HR: 1330h
AN: S52C-0150    [PDF]
TI: Open Access to Decades of NCSN Waveforms at the Northern California Earthquake Data Center
AU: * Neuhauser, D
EM: doug@seismo.berkeley.edu
AF: UC Berkeley, Seismo Lab 215 McCone Hall, Berkeley, CA 94720-4760 United States
AU: Klein, F
EM: klein@usgs.gov
AF: USGS, 345 Middlefield Rd, Menlo Park, CA 94025 United States
AU: Zuzlewski, S
EM: stephane@seismo.berkeley.edu
AF: UC Berkeley, Seismo Lab 215 McCone Hall, Berkeley, CA 94720-4760 United States
AU: Jensen, E G
EM: gjensen@usgs.gov
AF: USGS, 345 Middlefield Rd, Menlo Park, CA 94025 United States
AU: Oppenheimer, D
EM: oppen@usgs.gov
AF: USGS, 345 Middlefield Rd, Menlo Park, CA 94025 United States
AU: Gee, L
EM: lind@seismo.berkeley.edu
AF: UC Berkeley, Seismo Lab 215 McCone Hall, Berkeley, CA 94720-4760 United States
AU: Romanowicz, B
EM: barbara@seismo.berkeley.edu
AF: UC Berkeley, Seismo Lab 215 McCone Hall, Berkeley, CA 94720-4760 United States
AB: The USGS in Menlo Park has operated the Northern California Seismic Network (NCSN) since 1967 and has generated digital seismograms since 1984. Since its inception, the NCSN has recorded 2900 distinct channels at over 500 distinct sites. Although originally used only for earthquake location and coda magnitude, these seismograms are now of interest to seismologists for studying earth structure, precision relocations through cross correlation timing, and analysis of strong motion records. Until recently, the NCSN waveform data were available only through research accounts and special request methods due to incomplete instrument responses. Over the past 2 years, the USGS has assembled the necessary descriptions for both historic and current NCSN instrumentation. The NCEDC and USGS jointly developed a procedure to assemble the hardware attributes and instrument responses for the NCSN data channels using a combination of a simple spreadsheet that defines the attributes of each data channel, and a limited number of attribute files for classes of sensors and shared digitizers. These files are used by programs developed by the NCEDC to populate the NCEDC hardware tracking database tables and then to generate both the simple response and the full SEED instrument response database tables. As a result, the NCSN waveform data can now be distributed in SEED format with any of the NCEDC standard waveform request methods. The NCEDC provides access to waveform data through Web forms, email requests, and programming interfaces. The SeismiQuery Web interface provides information about data holdings. NetDC allows users to retrieve inventory information, instrument responses, and waveforms in SEED format. STP provides both a Web and programming interface to retrieve data in SEED or other user-friendly formats. Through the California Integrated Seismic Network, we are working with the SCEDC to provide unified access to California earthquake data. The NCEDC is a joint project of the UC Berkeley Seismological Laboratory and the USGS Menlo Park that provides a long-term archive and distribution center for geophysical data for northern California.
UR: http://quake.geo.berkeley.edu
DE: 7294 Instruments and techniques
DE: 7299 General or miscellaneous
DE: 9815 Notices and announcements
SC: Seismology [S]
MN: 2003 Fall Meeting