POTR - Potrero Hills, Fairfield, 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 POTR (PTRO)
In Operation 1998/12/10 22:18:00 - 2005/02/05 01:29:00
Elevation: 20.0 meters
Instrumentation Broadband


Site is located in the Potrero Hills area of the Sacramento River Delta near Fairfield, California. The site is a former Nike missile silo and is currently under the stewardship of the Army Corps of Engineers.


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


Eocene Marine

Borehole Conditions

The instruments are located within one of the Nike missile silos, with

GPS Monument Description

Concrete post with 5/8-11 rod.

Seismic Station Pictures

Equipment rack at POTR

Equipment rack at POTR

Typical STS-2 installation

Typical STS-2 installation

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

Table of Seismic Instrumentation

SensorDataloggerSEED ChannelsLocation
BroadbandStreckeisen STS-2 VBB Tri-Axial SeismometerQ4120BH?,HH?,LH?,UH?,VH?
AccelerometerKinemetrics FBA ES-T Accel. (2 g max 10 v/g)Q4120BL?,HL?,LL?
GPSSeptentrio PolaRx5Topcon Choke-RingSCIGN Tall-
SensorDataloggerSEED ChannelsLocation
OthersMotorola MPX201 PressureQ4120LD?
YSI 44031 ThermistorQ4120LK?
AuxiliaryBattery VoltageQ4120LE?,UE?
Internal TemperatureQ4120UF?

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


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
PTRO completeness last year
PTRO completeness lifetime


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
PTRO multipath last year
PTRO multipath lifetime

Signal-to-Noise Ratio

The Signal-to-Noise ratios are the mean values above the QC elevation mask for L1 and L2 respectively.

Previous Year
PTRO SNR last year
PTRO SNR lifetime