Map
of California & Nevada earthquakes
MNRC - McLaughlin Mine, CA, USA
View of the MNRC vault at McLaughlin Reserve |
2003/06/19 15:00:00 - Present
Latitude: 38.8787
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STS-2 and Episensor installation at MNRC |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
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The MNRC site is on property owned and formerly
operated by Homestake Mining Company as a surface gold mine.
The
geology of the area
is extremely varied and complex. With the conclusion of mining operations, the property
will be managed by UC Davis as the
McLaughlin Reserve
(part of the University of California Natural
Reserve System.
The seismographic vault is the first new research project on the reserve. The site is located
approximately 20 kilometers east of the town of Lower Lake,
California in an area of Franciscan sandstone.
Support for MNRC was provided by the Governor's Office of Emergency Services as part of the California Integrated Seismic Network.
- Geology:
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Franciscan sandstone
- Vault/Borehole conditions:
-
A steel and concrete vault from a shipping container
similar to those found at stations JCC,
PKD, and HOPS was
constructed. Power and telephone lines were trenched approximately
300 meters to the site. Because of the remoteness of the site,
digital telephone data circuits are not available. Telemetry was
established in spring 2004 using a radio network that brings the
data down to Napa and into the frame-relay network.
- Instrumentation:
-
Sensor Datalogger Start Date End Date SEED Channels Location Battery Voltage Q4120 2003/07/01 Present UE?,LE? Internal Temperature Q4120 2003/07/01 Present UK? Kinemetrics FBA ES-T Accel. (2 g max 10 v/g) Q4120 2003/06/19 Present LL?,BL?,HL? Motorola MPX201 Pressure Q4120 2003/06/19 Present LD? Streckeisen STS-2 VBB Tri-Axial Seismometer Q4120 2003/06/19 Present HH?,VH?,LH?,UH?,BH? Streckeisen STS-2 VBB Tri-Axial Seismometer Q4120 2003/07/01 Present UM? YSI 44031 Thermistor Q4120 2003/06/19 Present LK? - Network:
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BK (Berkeley Digital Seismic Network)
- Operation Notes: (may not be current)
- This section summarizes major changes in equipment or in instrumentation at MNRC.
- Noise Characteristics:
-
The figures below are cumulative plots of power spectral density (psd)
determined from the broadband channels. In each figure, the vertical
component psd is plotted with blue diamonds, the north component
psd with red squares, and the east component psd with green circles.
The results are presented in the 5 different frequency bands, and
the USGS/Albuquerque low noise model is plotted as a dashed line in each.
The PSD units are in dB (decibel) relative to 1 (m/s**2)**2/Hz. The current
annual plot is updated weekly.
Cumulative PSD results 1999 2000 2001 2002 2003 2004 2005 
- Data Availability:
- BDSN waveforms and associated metadata are available at the
Northern California Earthquake Data Center (NCEDC).
- Map of BDSN stations
- Table of BDSN stations
- BK Information Directory, including
- List of station locations
- List of available channels
- Instrument Response
- Information on Quanterra Timing Errors
- Information on Quanterra 4120 FIR Filter changes - 6/30/2003
- Information on BH sampling rate change - 06/15/2004
- View digital seismograms
Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.- Querying the archives
- Requesting data
Help on using these tools is available.
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Berkeley Seismological Lab
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Copyright 1995-2005, The Regents of the University of California.
Last modified: Wed Jun 25 13:34:08 PDT 2008