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YBH - Yreka Blue Horn Mine, Yreka, CA, USA

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Entrance to YBH adit

Entrance to YBH adit

1993/07/24 01:03:00 - Present

Latitude: 41.7320
Longitude: -122.7104
Elevation: 1059.70 meters

Typical STS-1 installation

Typical STS-1 installation

Location | Geology | Vault Conditions
Instrumentation | Network | Noise Characteristics | Data Availability

Location:
Site is located in the Klamath National Forest.

YBH is an auxillary station used by the Prepatory Commission for the Comprehensive Test Ban Treaty Organization. The STS-2 installed in 2002 supports CTBTO activities.

Geology:
Metavolcanics

Vault/Borehole conditions:
The sensors are located in an abandoned mining adit, approximately 115' from the entrance, on a poured concrete pier. Approximately 75 meters of overburden cover the adit. The seismometers are thermally insulated with 2" of polyurethane foam. The datalogger and supporting equipment are located approximately 50' from the entrance to the adit.

Instrumentation:
SensorDataloggerStart DateEnd DateSEED ChannelsLocation
AntennaCurrentQ330HR-GFE2011/06/03PresentVE?00
ClockPhaseQ330HR-GFE2011/06/03PresentLC?,VC?00
ClockQualityQ330HR-GFE2011/06/03PresentLC?,VC?00
InputVoltageQ330HR-GFE2011/06/03PresentVE?00
Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)Q330HR-GFE2011/06/03PresentHN?00
Streckeisen STS-1/E300 VBB Feedback SeismometerQ330HR-GFE2011/06/03PresentBH?,HH?,LH?,VH?00
SystemCurrentQ330HR-GFE2011/06/03PresentVE?00
SystemTemperatureQ330HR-GFE2011/06/03PresentVK?00
VCOValueQ330HR-GFE2011/06/03PresentVC?00
Streckeisen STS-2 VBB Tri-Axial SeismometerQ3302011/10/20PresentBH?,HH?,LH?,VH?50

Previous Instrumentation

The YBH site also is home to a continuously operating GPS receiver (YHBB) as part of the BARD network.

Network:
BK (Berkeley Digital Seismic Network)

Noise Characteristics:
Network PDF Noise Analysis Plots

Data Availability:
BDSN waveforms and associated metadata are available at the Northern California Earthquake Data Center (NCEDC).

Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.

Help on using these tools is available.

BDSN Overview | Map | Table