Map
of California & Nevada earthquakes
WDC - Whiskeytown Dam, Whiskeytown, CA, USA
View of WDC dome |
1992/09/17 19:23:00 - Present
Latitude: 40.5799
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Typical STS-2 installation |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
-
Site is located in the NEED camp of the
Whiskeytown-Shasta-Trinity
Recreational Area, under the auspices of the
US National Park Service.
WDC is also a cooperative station with the
Advanced National Seismic System.
- Geology:
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Gneiss
- Vault/Borehole conditions:
-
The sensors are located
approximately 150' into a tunnel
and encased in a steel tank which is
located on a poured concrete pad.
Approximately 25 meters of overburden
cover the tunnel. The datalogger and
supporting equipment is located in an
external building and connected via conduits.
- Instrumentation:
-
Sensor Datalogger Start Date End Date SEED Channels Location Battery Voltage Q935 2001/06/01 Present UE?,LE? Internal Temperature Q935 2001/06/01 Present UK? Kinemetrics FBA-23 Accel. (2 g max 1.25 v/g) Q935 1992/09/17 Present LL?,BL?,HL? Motorola MPX201 Pressure Q935 1996/05/30 Present LD? Streckeisen STS-2 VBB Tri-Axial Seismometer Q935 1992/09/17 Present UH?,BH?,VH?,LH?,HH? Streckeisen STS-2 VBB Tri-Axial Seismometer Q935 2001/06/01 Present UM? YSI 44031 Thermistor Q935 1996/05/30 Present LK? - Network:
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BK (Berkeley Digital Seismic Network)
- Operation Notes: (may not be current)
- This section summarizes major changes in equipment or in instrumentation at WDC.
- 06/15/2004: Changed BH channels sampling rate to 40 Hz.
- 10/11/1999: Q980 upgraded to MSHEAR software.
- 06/11/1998: Upgraded Q980 with 4 Gb disk and ethernet card.
- 06/01/1996: Installed barometer/thermometer package.
- 02/02/1996: Frame-relay telemetry installed.
- 07/20/1995: Replaced STS-2.
- 02/04/1994: Replaced GOES clock with GPS clock.
- 07/14/1992: A Streckeisen STS-2 and a Kinemetrics FBA-23 were installed with a Quanterra Q980 digitizer.
- Noise Characteristics:
-
The figures below are cumulative plots of power spectral density (psd)
determined from the broadband channels. In each figure, the vertical
component psd is plotted with blue diamonds, the north component
psd with red squares, and the east component psd with green circles.
The results are presented in the 5 different frequency bands, and
the USGS/Albuquerque low noise model is plotted as a dashed line in each.
The PSD units are in dB (decibel) relative to 1 (m/s**2)**2/Hz. The current
annual plot is updated weekly.
Cumulative PSD results 1999 2000 2001 2002 2003 2004 2005 
- Data Availability:
- BDSN waveforms and associated metadata are available at the
Northern California Earthquake Data Center (NCEDC).
- Map of BDSN stations
- Table of BDSN stations
- BK Information Directory, including
- List of station locations
- List of available channels
- Instrument Response
- Information on Quanterra Timing Errors
- Information on Quanterra 4120 FIR Filter changes - 6/30/2003
- Information on BH sampling rate change - 06/15/2004
- View digital seismograms
Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.- Querying the archives
- Requesting data
Help on using these tools is available.
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Berkeley Seismological Lab
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Copyright 1995-2005, The Regents of the University of California.
Last modified: Tue Dec 9 08:31:30 PST 2008