MTOS - Mt Oso, Westley, 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 MTOS
In Operation 2017/05/06 00:20:00 - Present
Elevation: 310.0 meters
Instrumentation Broadband


Site is located at Mt. Oso in Westley, CA


Berkeley Digital Seismic Network (BK)


Melange of fragmented and sheared Franciscan Complex rocks

Borehole Conditions

The MTOS installation is based on the USArray vault design.

Station Pictures

Solar panels at MTOS.

Solar panels at MTOS.

The vault at MTOS.

The vault at MTOS.

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
BroadbandREF TEK 151B-120 USGSQ330S+ USGSBH?,HH?,LH?,VH?00
AccelerometerKinemetrics FBA ES-T Accel. USGS (4 g max 5 v/g)Q330S+ USGSHN?,LN?00
AuxiliaryAntennaCurrentQ330S+ USGSVE?00
ClockLockLossQ330S+ USGSLC?00
ClockPhaseQ330S+ USGSLC?00
ClockQualityQ330S+ USGSLC?00
InputVoltageQ330S+ USGSVE?00
MotherBoardVoltageQ330S+ USGSVA?00
SystemCurrentQ330S+ USGSVE?00
SystemTemperatureQ330S+ USGSVK?00
VCOValueQ330S+ USGSVC?00

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

Waveform Data