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Contributing Networks

The following information is available for the seismic and geophysical networks that contribute data to the NCEDC:

This document describes the data collection by network. Other documents describe the data by type and by access. Or see the summary of products for an overview of the entire holdings.

Parkfield High Resolution Seismic Network - HRSN (overview | map | data)

Map of BP network
sites The Parkfield High Resolution Seismic Network, a part of the Parkfield Prediction Experiment, has produced a high resolution earthquake data set as a secondary effort in the 'Controlled Source Monitoring' (Vibroseis) project. Available data include the Parkfield HRSN earthquake location catalog and waveform archive.

Berkeley Digital Seismic Network - BDSN/NHFN/MPBO/MOBB (overview | map | data)

Map of BK network
sites The BK network code may be thought of as including several different networks, including the sparse broadband network known as the BDSN, the collection of borehole geophones and accelerometers established for monitoring the northern Hayward fault (NHFN), and the collaborative project in geophysical monitoring known as the mini-Plate Boundary Observatory project (MPBO). Available data include continuous and triggered waveforms, catalogs of hypocenters, phase and amplitude readings, and moment tensor solutions.

Northern California Seismic Network - NCSN (overview | map | data)

Map of NC network
sites The NCSN was originally deployed as a dense short-period seismic network in northern and central California, run by the USGS, Menlo Park. This network is also known as CALNET. More recently, the NCSN has deployed a number of broadband stations and strong-motion sensors. Available data include triggered waveforms, catalogs of hypocenters, phase and amplitude readings, and first-motion mechanisms.

UNR Broadband Network (overview | map | data)

Map of NN network
sites The University of Nevada, Reno, operates a network which includes 4 stations with broadband sensors located in western Nevada and eastern California. A waveform archive of these broadband data is available at the NCEDC.

Calpine/Unocal Geysers Network (overview | map | data)

Map of Geysers network
sites A borehole microseismic network was original deployed in the Geysers Geothermal Field by the Unocal Corporation. Now operated by the Calpine Corporation, 10 years of triggered event waveform data are available at the NCEDC.

USGS Low-Frequency Geophysical Network (overview | map | data)

Map of UL network
sites An extensive collection of fault monitoring data from California, Oregon, Alaska and the South Pacific is available through the UL network. The dataset consists of 9 different experiment types and contains over 1300 channels of strain, creep, magnetic field, tilt, well water level, differential lake level, electric field, pore pressure and associated environmental measurements such as rainfall, barometric pressure, wind speed, snow depth and crustal temperature at various depths.

BARD - Bay Area Regional Deformation Network (overview | map | data)

Map of BARD network
sites BARD is a network of 32 continuous GPS sites in northern California that measure deformation related to strain accumulation on the San Andreas Fault system, as well as displacements caused by earthquakes and fault creep. Data is available in real-time from the Berkeley Seismological Lab's NTRIP caster and daily files are available from the NCEDC.

USGS Continuous GPS network (overview | data)

The USGS office in Menlo Park, CA operates eight continuous GPS stations in the San Francisco Bay Area. Daily raw and RINEX files are available each day following UTC midnight. Public access to real-time data streams is available through the Berkeley Seismological Lab's NTRIP caster (account info).

EarthScope Program

The Earthscope program is an initiative of the National Science Foundation to investigate the structure and evolution of the North American continent and the physical processes controlling earthquakes and volcanic eruptions. The NCEDC is archiving several types of data from the Earthscope program.

PBO Strain data (Overview | Data)

The Plate boundary Observatory (PBO) is a geodetic observatory designed to study the three-dimensional strain field resulting from deformation across the active boundary zone between the Pacific and North American plates in the western United States. The observatory consists of arrays of Global Positioning System (GPS) receivers and strainmeters which will be used to deduce the strain field on timescales of days to decades and geologic and paleoseismic investigations to examine the strain field over longer time scales.

SAFOD Seismic data (Overview | Data)

The San Andreas Fault Observatory at Depth (SAFOD) is a deep borehole observatory that will directly measure the physical conditions under which plate boundary earthquakes occur.

The SAFOD pilot hole is a separate, 2.2-km-deep scientific drilling experiment at the same surface location as SAFOD. This site is ~ 1.8 km SW of the San Andreas fault near Parkfield, CA, on a segment of the fault that moves through a combination of aseismic creep and repeating microearthquakes. It lies just north of the rupture zone of the 2004, magnitude 6 Parkfield earthquake, the most recent in a series of events that have ruptured the fault six times since 1857.

USArray Seismic data (Overview | Data )

Data from 19 stations of the Berkeley Digital Seismic Network are part of the USArray deployment in California. The NCEDC is also archiving data from the Transportable Array stations being deployed in central and northern California, southern Oregon, and western Nevada.