MNRC - McLaughlin Natural Reserve (UC Davis), 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.
BARD is our GPS network for monitoring crustal deformation across the Pacific-North America plate boundary and in the San Francisco Bay Area for earthquake hazard reduction studies and rapid earthquake emergency response assessment
|Station Name||MNRC (MNRC)|
|In Operation||2003/06/19 15:00:00 - Present|
LocationThe 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.
NetworkBerkeley Digital Seismic Network (BK)
Bay Area Regional Deformation Network Network (BARD)
Borehole ConditionsA 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.
GPS Monument DescriptionAntenna mount is embedded in wall of concrete seismic vault, built on bedrock.
Seismic Station Pictures
View of the MNRC vault at McLaughlin Reserve
STS-2 and Episensor installation at MNRC
- Time series processing at the BSL *
Last year Clean Clean & detrended Raw Raw & detrended Lifetime Clean Clean & detrended Raw Raw & detrended Text file (final results only) Clean Raw
GPS Station Pictures
Table of Seismic Instrumentation
|Broadband||Streckeisen STS-2 VBB Tri-Axial Seismometer||Q330HR-GFE||BH?,HH?,LH?,VH?||00|
|Accelerometer||Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)||Q330HR-GFE||HN?||00|
|GPS||Septentrio PolaRx5||Topcon Choke-Ring||SCIGN Tall||-|
Waveforms and associated metadata, and GPS data, are available at the Northern California Earthquake Data Center (NCEDC).
- BK Information Directory, including
Data completeness is defined both as "Completeness of observations" and "Cycle slips per observation". "Completeness of Obs." is the number of epochs in the final RINEX file normalized to the expected number. This percentage will go down if time is missing from the RINEX file. "Cycle slips per Obs." is the total number of detected cycle slip normalized to the total number of observations in the RINEX file. This number will increase as the receiver loses lock on satellites more frequently.
The effects of multipath on the data are estimated by parameters for L1 and L2 (MP1 and MP2 respectively); see Estey and Meertens (GPS Solutions, 1999) for derivation. The daily value is the RMS of MP1 and MP2 throughout the day and for all satellites. Higher values indicate a greater prevalence and/or strength of multipathing, i.e. objects on the ground are providing multiple reflection pathways from the satellite to antenna.
The Signal-to-Noise ratios are the mean values above the QC elevation mask for L1 and L2 respectively.