Geophysical Networks

The BSL operates a variety of seismic sensors and other geophysical instrumentation in a range of different types of installations. Broadband stations have high dynamic range, broadband seismometers with collocated strong-motion accelerometers, mostly in installations at or near the earth's surface. In our borehole stations, seismic sensors, mostly geophones and/or high-gain accelerometers are deployed in boreholes below the earth's surface to reduce noise. We also operate a network of permanent, continuously telemetered high-resolution GPS stations. At many of our sites, other geophysical sensors are monitored to improve our understanding of the earth. Closed stations are no longer recording data.

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Broadband Stations

Berkeley Digital Seismic Network

The BDSN is an array of high dynamic range, broadband seismometers with collocated strong-motion accelerometers in northern and central California. BDSN Overview...


Borehole Stations

Berkeley Borehole Network

The BSL operate a number of stations in the Bay Area with seismic and other geophysical sensors in boreholes. They are tools for observing tiny earthquakes and other deformation signals that may hint of incipient seismic movements. If the instruments were installed near the surface, civilization noise (vibrations from vehicles and other human sources) would overshadow the tiny signals that we wish to study. The funding for these stations come from a variety of sources.BBN Overview...

Parkfield High-Resolution Seismic Network

Located in Parkfield, California, the HRSN is a small network of closely spaced 3-component borehole sensors. HRSN Overview


GPS stations

Bay Area Regional Deformation Network

BARD is a network of 32 continuously operating Global Positioning System receivers in Northern California. The primary goal of the network is to monitor crustal deformation across the Pacific-North America plate boundary and in the San Francisco Bay Area for earthquake hazard reduction studies and rapid earthquake emergency response assessment. BARD Overview...