HATC - Hat Creek Radio Astronomy Obs., Cassel, 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 HATC
In Operation 2005/05/18 00:00:00 - Present
Elevation: 1009.3 meters
Instrumentation Broadband


The site is located at Hat Creek Observatory, operated by the Radio Astronomy Laboratory of the University of California. Hat Creek is located near Mt. Lassen in Lassen Volcanic National Park, in Northern California.

Location of Hat Creek station

This station is part of a collaboration between the Berkeley Seismological Laboratory and the Radio Astronomy Laboratory. This station was installed in May 2005 by USArray personnel as a collaboration with the Berkeley Seismological Laboratory, and was part of the USArray component of the Earthscope program. When the Travelling Array left California in 2007, the BSL adopted this station. It has been operating as a BDSN station since May 2008.


Berkeley Digital Seismic Network (BK)



Borehole Conditions

The HATC installation is based on the USArray vault design.

Station Pictures

Jarrett standing in vault at HATC

Jarrett standing in vault at HATC

View from vault toward Mt. Lassen

View from vault toward Mt. Lassen

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
BroadbandStreckeisen STS-2 VBB Tri-Axial SeismometerQ330HRBH?,HH?,LH?,VH?00
AccelerometerKinemetrics FBA ES-T Accel. (4 g max 5 v/g)Q330HRHN?00

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

Waveform Data