W02B - Bay Bridge Pier W2, San Francisco, CA, USA

We operate broadband and borehole stations under the network code BK. The Berkeley Digital Seismic Network (BDSN) is a regional network of very broadband and strong motion seismic stations designed to monitor regional seismic activity as well as provide high quality data. The Berkeley borehole stations have borehole geophones or other seismic sensors and may have other geophysical instrumentation.

Station Name W02B
In Operation 2003/06/18 00:00:00 - 2010/06/06 23:51:33
Elevation: -45.1 meters
Instrumentation Borehole


W20b is one of the bridge sites of the Northern Hayward Fault Network. The borehole is located near pier W2 on the San Francisco - Oakland Bay Bridge. This site is operated under the auspices of Caltrans.


Northern Hayward Fault Network (BK)



Borehole Conditions

The instruments are at a depth of 58 m.

Station Pictures

San Francisco-Oakland Bay Bridge<br>Courtesy of Caltrans

San Francisco-Oakland Bay Bridge
Courtesy of Caltrans

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
AccelerometerWilcoxon 731A Accel. (0.5 g max 10 v/g)Q4120BL?,CL?,HL?,LL?
GeophoneOyo GeoSpace GS-11 Vertical GeophoneQ4120BP?,DP?,EP?,LP?
AuxiliaryBattery VoltageQ4120LE?,UE?

Waveforms and associated metadata are available at the Northern California Earthquake Data Center (NCEDC).

Waveform Data