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BKS - Byerly Seismographic Vault, Berkeley, CA, USA

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Entrance to Byerly adit

Entrance to Byerly adit

1987/05/05 00:00:00 - Present

Latitude: 37.8762
Longitude: -122.2356
Elevation: 243.90 meters

Typical STS-1 installation

Typical STS-1 installation

Location | Geology | Vault Conditions
Instrumentation | Network | Noise Characteristics | Data Availability

Location:
Site is located in Strawberry Canyon, just east of the UC Berkeley campus, in an installation known as Byerly Seismographic Vault. The vault was constructed in 1962 in order to relocate instruments from Haviland Hall (station BRK), as "cultural" noise levels were growing in amplitude. The first digital broadband instrumentation was installed in 1988.

In addition to the UC Berkeley instrumentation, this vault is home to USGS tiltmeters and a UREDAS system. This site is frequently used for instrument testing and calibration.

Geology:
Miocene Claremont cherts and shales

Vault/Borehole conditions:
The instruments are sited in the Byerly Seismographic Vault in Strawberry Canyon. The vault is a 105 foot adit dug horizontally at a NW azimuth into the side of a hill. The piers are constructed of reinforced concrete in the rear of the vault and are not isolated from floor and walls. The vault is thermally stable and a ventilating/dehumidifying system is connected to all rooms. There are three interior doors leading to the room housing the seismometers. The seismometers are thermally insulated with 4 inches of polyurethane foam.

Instrumentation:
SensorDataloggerStart DateEnd DateSEED ChannelsLocation
AntennaCurrentQ330HR-GFE2011/02/25PresentVE?00
ClockPhaseQ330HR-GFE2011/02/25PresentLC?,VC?00
ClockQualityQ330HR-GFE2011/02/25PresentLC?,VC?00
InputVoltageQ330HR-GFE2011/02/25PresentVE?00
Kinemetrics FBA ES-T Accel. GFE (2 g max 10 v/g)Q330HR-GFE2011/02/25PresentHN?00
Streckeisen STS-1/E300 VBB Feedback SeismometerQ330HR-GFE2011/02/25PresentBH?,HH?,LH?,VH?00
SystemCurrentQ330HR-GFE2011/02/25PresentVE?00
SystemTemperatureQ330HR-GFE2011/02/25PresentVK?00
VCOValueQ330HR-GFE2011/02/25PresentVC?00

Previous Instrumentation

Network:
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).

Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.

Help on using these tools is available.

BDSN Overview | Map | Table