MOD - Modoc Plateau, 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 MOD (MODB)
In Operation 1999/10/16 00:00:00 - Present
Latitude
Longitude:
Elevation: 1554.5 meters
Instrumentation Broadband
GPS

Location

Site is located on private property in Modoc County, California, approximately 10 kilometers from the Oregon border and 20 kilometers from the Nevada border. MOD was established to replace MIN, which had become increasingly noisy due to traffic on route 36.

MOD is a cooperative station with the US National Seismic Network

Network

Berkeley Digital Seismic Network (BK)
Bay Area Regional Deformation Network Network (BARD)

Geology

Pyroclastic Rock

Borehole Conditions

The vault is a horizontal tunnel, located beneath 5 meters of overburden to maintain thermal stability.

GPS Monument Description

Reinforced concrete monument

Seismic Station Pictures

NSN VSAT at MOD

NSN VSAT at MOD

MOD construction

MOD construction

GPS Station Timeseries

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

MODB

MODB

MODB

MODB

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
BroadbandStreckeisen STS-2 VBB Tri-Axial SeismometerQ330HRBH?,HH?,LH?,VH?00
AccelerometerKinemetrics FBA ES-T Accel. (2 g max 10 v/g)Q330HRHN?00
ReceiverAntennaRadome-
GPSTrimble NetRSAshtech Choke-RingSCIGN Tall-
SensorDataloggerSEED ChannelsLocation
AuxiliaryAntennaCurrentQ330HRVE?00
ClockPhaseQ330HRLC?,VC?00
ClockQualityQ330HRLC?,VC?00
InputVoltageQ330HRVE?00
SystemCurrentQ330HRVE?00
SystemTemperatureQ330HRVK?00
VCOValueQ330HRVC?00

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

Waveform Data



GPS Data

Noise Analysis

View more noise plots

GPS Data Quality


Completeness

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.

Previous Year
MODB completeness last year
Lifetime
MODB completeness lifetime

Multipath

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.

Previous Year
MODB multipath last year
Lifetime
MODB multipath lifetime