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.

Go to Networks Map for Mobile

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

Hayward Fault Network

The NHFN is an array of borehole instrumentation deployed in the San Francisco Bay Area, with the goal of monitoring microseismicity on the Hayward fault. The borehole stations are deployed along the fault at free-field and Bay Area bridge locations. NHFN Overview...

Mini-Plate Boundary Project

The Plate Boundary Observatory (PBO) component of EarthScope is a geodetic observatory designed to study the three-dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States. The observatory consists of arrays of Global Positioning System (GPS) receivers and strainmeters which will be used to deduce the strain field on timescales of days to decades. MPBO 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...