Map
of California & Nevada earthquakes
JAS - Jamestown, CA, USA
No photos are currently available |
1980/10/01 00:00:00 - 1984/07/25 23:59:00
Latitude: 37.9466
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No photos are currently available |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
-
The site was located in Jamestown, California, and operated in
cooperation with the California
Department of Water Resources, begining in 1964.
This station was relocated to JAS1
when the rising price of gold in the
mid-1980s led to renewed mining activity.
JAS (and JAS1) were part of the USGS Digital World Wide Standard Seismograph Network (DWWSSN), the digital descendant of the WWSSN.
- Geology:
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pre-Cretaceous metamorphic rocks
- Vault/Borehole conditions:
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Seismometers are located in an old gold mine on a concrete pad attached to bedrock.
- Instrumentation:
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Sensor Datalogger Start Date End Date SEED Channels Location Teledyde Geotech T210 LP V Seismometer DWSSN 1980/10/01 1984/07/25 MH?,LH? Teledyne Geotech S13 SP V Seismometer DWSSN 1980/10/01 1984/07/25 BH? Teledyne Geotech T200 LP H Seismometer DWSSN 1980/10/01 1984/07/25 MH?,LH? - 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 JAS.
- 06/26/1984: Station closed due to mining activity; instruments relocated to JAS1.
- 10/01/1980: USGS DWSSN system installed at JAS. 16-bit data recorded on magnetic tape.
- Noise Characteristics:
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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: Wed Jun 25 13:34:08 PDT 2008