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.



Station Name HERB
In Operation 2001/09/18 23:44:00 - Present
Latitude
Longitude:
Elevation: -18.0 meters
Instrumentation Borehole

Location

The station is located at the Hercules Maintenance Yard in Hercules, California, and is under the auspices of Caltrans.

Network

Northern Hayward Fault Network (BK)

Geology

To be determined

Borehole Conditions

The HERB borehole was drilled by Caltrans and the sensor package cemented at the depth of 217m.

Station Pictures

Caltrans drill rig at HERB

Caltrans drill rig at HERB

Drilling the HERB borehole

Drilling the HERB borehole

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
AccelerometerWilcoxon 731A Accel. (0.5 g max 10 v/g)BASALT8XBN?,CN?,LN?40
GeophoneOyo GeoSpace GS-11 Vertical GeophoneBASALT8XDP?,LP?,SP?40
AuxiliaryCPULoadAverageBASALT8XLC?40
ClockPhaseBASALT8XLC?40
ClockQualityBASALT8XLC?40
DataStorageUsedBASALT8XLC?40
InputVoltageBASALT8XLE?40
SystemCurrentBASALT8XLE?40
SystemHumidityBASALT8XLI?40
SystemTemperatureBASALT8XLK?40
TXCOValueBASALT8XLC?40