HERB - Caltrans Maintenance Yard, Hercules, 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.
|In Operation||2001/09/18 23:44:00 - Present|
LocationThe station is located at the Hercules Maintenance Yard in Hercules, California, and is under the auspices of Caltrans.
NetworkNorthern Hayward Fault Network (BK)
Sandstone, shale, silstone, and breccia
Borehole ConditionsThe HERB borehole was drilled by Caltrans and the sensor package cemented at the depth of 217m.
Table of Seismic Instrumentation
|Accelerometer||Wilcoxon 731A Accel. (0.5 g max 10 v/g)||BASALT8X||BN?,CN?,LN?||40|
|Geophone||Oyo GeoSpace GS-11 Vertical Geophone||BASALT8X||DP?,LP?,SP?||40|
Waveforms and associated metadata are available at the Northern California Earthquake Data Center (NCEDC).
- BK Information Directory, including