Map
of California & Nevada earthquakes
STAN - Stanford, CA, USA
View of the Stanford big dish |
1991/08/20 00:20:00 - 1994/06/30 15:06:00
Latitude: 37.4039
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Typical STS-2 installation |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
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STAN was located near the big dish at Stanford University,
and established in cooperation with the
School of Earth Sciences
This location was found to be noisy, both due to wind and to traffic on Highway 280 and the site was closed in July 1994. The instrumentation was relocated to JRSC, on the Jasper Ridge Biological Preserve.
- Geology:
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Alluvium
- Vault/Borehole conditions:
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The instruments are sited at the
northeast corner of a single-story,
wood-frame building located on a
ridge. The pier is the poured-concrete
floor, and all the support equipment
is located adjacent to the seismometers.
- Instrumentation:
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Sensor Datalogger Start Date End Date SEED Channels Location Kinemetrics FBA-23 Accel. (2 g max 1.25 v/g) Q680 1991/08/20 1994/06/30 HL?,LL?,BL? Streckeisen STS-2 VBB Tri-Axial Seismometer Q680 1991/08/20 1994/06/30 VH?,BH?,HH?,UH?,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 STAN.
- 06/30/1994: The station was closed and the equipment relocated at JRSC.
- 04/24/1992: The FBA-23 was rewired.
- 04/29/1991: The digitizer module for the FBA-23 was replaced.
- 04/01/1991: A Streckeisen STS-2 and a Kinemetrics FBA-23 were installed with a Quanterra Q680 digitizer. This site is operated cooperatively with Stanford University.
- 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: Wed Jun 25 13:34:08 PDT 2008