CRQB - Carquinez Bridge, Crockett, 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 CRQB
In Operation 1996/07/04 01:40:00 - 2010/05/17 19:00:00
Elevation: -25.0 meters
Instrumentation Borehole



Northern Hayward Fault Network (BK)


Shale Formation

Borehole Conditions

Station Pictures

Historical Carquinez Bridge<br>Courtesy of Caltrans

Historical Carquinez Bridge
Courtesy of Caltrans

New Carquinez Bridge<br>Courtesy of Caltrans

New Carquinez 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?