SAO - San Andreas Geophysical Obs., Hollister, CA, USA
View of SAO equipment building
1988/01/28 00:00:00 - Present
View of SAO vault
Site is located at the San Andreas Geophysical Observatory
in the Hollister
Hills State Vehicle Recreation Area. The BSL first
occupied this site in 1966, with a variety of
geophysical instrumentation. The digital broadband sensors
were installed in 1988.
SAO is a cooperative station with the Advanced National Seismic System.
Jurassic-Cretaceous Gabilan Granite
- Vault/Borehole conditions:
The vault is a buried steel culvert liner with a set of three
isolation doors leading to the interior. The pier is poured concrete.
The datalogger and supporting equipment are located in an
air-conditioned structure approximately 50' away and connected via
underground conduits. The seismometers are thermally
insulated with 4" of polyurethane foam.
Sensor Datalogger Start Date End Date SEED Channels Location AntennaCurrent Q330HR-GFE 2010/05/20 Present VE? 00 ClockPhase Q330HR-GFE 2010/05/20 Present LC?,VC? 00 ClockQuality Q330HR-GFE 2010/05/20 Present LC?,VC? 00 InputVoltage Q330HR-GFE 2010/05/20 Present VE? 00 Kinemetrics FBA ES-T Accel. GFE (2 g max 10 v/g) Q330HR-GFE 2010/05/20 Present HN? 00 Streckeisen STS-1/E300 VBB Feedback Seismometer Q330HR-GFE 2012/09/18 Present BH?,HH?,LH?,VH? 00 SystemCurrent Q330HR-GFE 2010/05/20 Present VE? 00 SystemTemperature Q330HR-GFE 2010/05/20 Present VK? 00 VCOValue Q330HR-GFE 2010/05/20 Present VC? 00 Battery Voltage Q4120 2010/05/20 Present AE? Electric Field Dipole (Pb-PbCl or Cu-CuS Anodes) Q4120 2002/03/30 Present BQ?,LQ?,UQ?,VQ? ElectroMagnetics Inc. BF4 Magnetometer Q4120 2002/03/09 Present BT?,LT?,UT?,VT? Internal Temperature Q4120 2010/05/20 Present AK?
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
- 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
- Querying the archives
- Requesting data by channel and time
- Requesting data by event
Help on using these tools is available.