Seismic Instrumentation

The Berkeley Seismological Laboratory operates several networks of seismic instrumentation in northern and central California. These include:

We have put together a small collection of photographs from BDSN, HFN, and BARD sites.

Berkeley Digial Seismic Network (BDSN)

The BDSN is a sparse array, consisting of ~20 broadband, high-dynamic range stations. Each of the BDSN sites is equipped with a broadband seismometer, a strong-motion accelerometer, and a 24-bit digital datalogger. Most sites are also equipped with temperature and pressure sensors. Data from the stations are transmitted to UC Berkeley continuously, using dedicated digital telemetry. In order to avoid data loss during utility disruptions, each site has a 3-day supply of battery power and is also accessible via a dialup phone line.

The BDSN overview describes the network in greater detail, while the map illustrates the geographic distribution of the network. The station table provides a complete index of BDSN stations with additional information on station siting, instrumentation, and details about instrument responses.

Hayward Fault Network (HFN)

The Hayward Fault Network is an array of borehole instruments deployed along the Hayward Fault in the San Francisco Bay Area. Through an agreement with the USGS Menlo Park, the instruments along the northern section of the fault are operated by UC Berkeley, while instruments along the southern section are operated by the USGS Menlo Park. Each station is equipped with an accelerometer and a geophone with a 24-bit datalogger. The Northern HFN is considered part of the BDSN and uses the network code BK. The Southern HFN is considered part of the NCSN and uses the network code NC.

The Northern HFN overview describes the network in greater detail, while the map illustrates the geographic distribution of the network. The station table provides a complete index of Northern HFN stations with additional information on station siting, instrumentation, and details about instrument responses.

Parkfield High Resolution Seismic Network (HRSN)

The High Resolution Seismic Network is part of the Parkfield Prediction Experiment. Initially developed as a network for controlled source monitoring, it was recently upgraded and converted for earthquake monitoring. The HRSN is a network of borehole geophones, with 24-bit digital dataloggers and continuous telemetry to a central site in Parkfield. The central site facility performs event detection and ships triggered waveform data to the BSL for archive.

The HRSN overview describes the network in greater detail, while the map illustrates the geographic distribution of the network. The station table provides a complete index of HRSN stations with additional information on station siting, instrumentation, and details about instrument responses.


BDSN Overview BDSN Map BDSN Table
HFN Overview HFN Map HFN Table
HRSN Overview HRSN Map HRSN Table

Return to the Berkeley Seismological Laboratory

The Berkeley Seismological Laboratory, 202 McCone Hall, UC Berkeley, Berkeley CA 94720
Questions and comments to www@seismo.berkeley.edu
Copyright 1999-2000, The Regents of the University of California.