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FARB - Farallon Islands, CA, USA |
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Site of FARB vault |
1997/03/15 00:00:00 - Present
Latitude: 37.6978
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Aerial photograph of island |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Noise Characteristics |
Data Availability
- Location:
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Site is located on the
Farallon National
Wildlife Refuge, offshore of San Francisco, and is under the auspices of
the US Fish and Wildlife Service.
This is a particularly tricky site for maintenance, since access to
the Island is limited. This site experiences loss of power from
time to time, due to problems with the island generator. Despite
the 15 batteries, there are periods of time when the station is
down due to loss of power. This site also experiences occasional problems due
to corrosion of cables.
- Geology:
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Granite
- Vault/Borehole conditions:
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The sensors are installed in a near-surface
vault and covered with rocks and foam
in order to provide thermal stability.
- Instrumentation:
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Sensor Datalogger Start Date End Date SEED Channels Location AntennaCurrent Q330HR-GFE 2010/04/07 Present VE? 00 ClockPhase Q330HR-GFE 2010/04/07 Present LC?,VC? 00 ClockQuality Q330HR-GFE 2010/04/07 Present LC?,VC? 00 InputVoltage Q330HR-GFE 2010/04/07 Present VE? 00 Kinemetrics FBA ES-T Accel. (2 g max 10 v/g) Q330HR-GFE 2010/04/07 Present HN? 00 Streckeisen STS-2 VBB Tri-Axial Seismometer Q330HR-GFE 2010/04/07 Present BH?,HH?,LH?,VH? 00 SystemCurrent Q330HR-GFE 2010/04/07 Present VE? 00 SystemTemperature Q330HR-GFE 2010/04/07 Present VK? 00 VCOValue Q330HR-GFE 2010/04/07 Present VC? 00 The FARB site also is home to a continuously operating GPS receiver as part of the BARD network.
- Network:
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BK (Berkeley Digital Seismic Network)
- Noise Characteristics:
- Network PDF Noise Analysis Plots
- 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 by channel and time
- Requesting data by event
Help on using these tools is available.
