Map
of California & Nevada earthquakes
ORV - Oroville Dam, Oroville, CA, USA
ORV pier with STS-1s |
1992/07/31 18:50:00 - Present
Latitude: 39.5545
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ORV vault |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
-
Site is located near the
Oroville Dam, and is
under the auspices of the
CA Department of Water Resources.
- Geology:
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Eocene basalt
- Vault/Borehole conditions:
-
The vault is made of concrete, orientated
north/south, and excavated into a hilltop.
Approximately 1 meter of backfilled soil covers the top
of the vault. The datalogger is located in an adjacent
building (90' away) connected by conduits. The
seismometers are thermally insulated with 4" of
polyurethane foam. The accelerometer is co-located
with the datalogger.
- 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 1992/07/31 Present LL?,BL?,HL? Motorola MPX201 Pressure Q935 1997/05/23 Present LD? Streckeisen STS-1 VBB Feedback Seismometer Q935 1992/07/31 Present UH?,BH?,VH?,LH?,HH? Streckeisen STS-1 VBB Feedback Seismometer Q935 2001/06/01 Present UM? YSI 44031 Thermistor Q935 1997/05/23 Present LK? The ORV site also is home to a continuously operating GPS receiver (ORVB) as part of the BARD network.
- Network:
-
BK (Berkeley Digital Seismic Network)
- Operation Notes: (may not be current)
- This section summarizes major changes in equipment or in instrumentation at ORV.
- 06/15/2004: Changed BH channels sampling rate to 40 Hz.
- 12/04/1999: Q980 software upgraded to MSHEAR.
- 07/27/1998: Replaced GOES clock with GPS1 clock.
- 03/30/1998: Q980 upgraded with 4 GB disk and ethernet card. Warpless baseplates installed.
- 08/30/1996: GPS antenna and cable installed, along with pressure-temperature sensors.
- 03/14/1996: Frame-relay telemetry operational.
- 06/10/1993: The FBA-23 package was reoriented so that the NS component was correctly aligned. Replaced QVI board in Q980. Completed thermal insulation of the STS-1 sensors. From 07/29/92-06/10/93 the NS component was oriented N40W.
- 07/29/1992: A Streckeisen STS-1 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 2 11:59:55 PST 2008