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Product Summary

Current Earthquakes | Catalogs | Seismograms
GPS | Other geophysical data | Synthetic Aperature Radar

This document provides a complete overview of all NCEDC products. Other documents describe the data by type, by contributing network, and by access.


Current Earthquake Information

Current earthquake information for northern and central California is available from the joint effort of the USGS and BSL as part of the California Integrated Seismic Network.

Current Earthquake Information
Information type Region Time period
Map of recent events California & Nevada Last 7 days
List of recent earthquakes California & Nevada Last 7 days
Did you feel it? Report on an earthquake California Recent and historical
ShakeMap Northern California Recent and historical
ShakeMap Southern California Recent and historical
NCSN Seismocams Northern California Current
BDSN Seismocams Northern California Current
SCSN Seismocams Southern California Current
Make Your Own Seismogram Northern California Current and historical

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Catalogs

The NCEDC provides access to several different earthquake catalogs. At the present time, both the USGS and the BSL produce earthquake catalogs for northern California and these may be accessed through the Web. The USGS and the BSL are working to generate a single, authoritative catalog and hope to have this available soon. In additional, catalogs associated with the Geysers and Parkfield networks are available and these are useful as entry points into the waveform data. Finally, the NCEDC hosts the ANSS composite earthquake catalog.

Catalogs
Agency/Network Region Data type Time period Access Formats
BSL Northern California
& surrounding areas
hypocenters, magnitudes, phase and amplitude readings 1910-present (hypo and mag)
1984-present (phase and amp)
Searchable Web interface
BSL Northern California
& surrounding areas
moment tensors 1990-present Text file
USGS Northern California hypocenters & magnitudes
phase and amplitude readings
first-motion mechanisms
1967-present Searchable Web interface
Townley-Allen Catalog Northern California
& surrounding areas
hypocenters 1769-1927 Text file
BSL
HRSN
Parkfield hypocenters 1987-1998 Text file
Calpine/Unocal Geysers Geysers hypocenters & magnitudes 1995-1998 Text file -
ANSS Global hypocenters & magnitudes 1898-present Searchable Web interface
FTP

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Seismic Waveform Data

Several networks contribute waveform data to the NCEDC. The NC and BK networks span northern California, while localized networks focus on the Gesyers, the Hayward Fault, and Parkfield. Data from the Hayward fault stations are folded into the BDSN and NCSN, while data from the HRSN and Calpine/Unocal Geysers network are not. - More information

Seismic Waveforms
Network Region Instrumentation Data type Time period Access Documents Noise Analysis
BDSN (BK) Northern California Broadband and strong motion Continuous and event triggered 1986-present Searchable Web interface

View or make your own seismograms

view PDF Plots
NCSN (NC) Northern California Short-period, strong motion, and some broadband Continuous and event triggered 1984-present Searchable Web interface

EVT_FAST web/email request

Research account

view PDF Plots
NHFN (BK) Northern Hayward Fault Borehole acceleration and velocity Continuous and event triggered 1996-present Searchable Web interface view PDF Plots
SHFN (NC) Southern Hayward Fault Borehole acceleration and velocity Event triggered 1994-present Searchable Web interface

EVT_FAST web/email request

Research account

view PDF Plots
MPBO (BK)
Mini-Plate Boundary Observatory Project
San Francisco Bay Area Borehole velocity and strain Continuous and event triggered 2001-present Searchable Web interface view PDF Plots
HRSN (BP) Parkfield Borehole velocity Event triggered and continuous 1987-1998

1999-2000

2001-present
Research account

Not available at this time

Searchable Web interface

FTP

view PDF Plots
Calpine/Unocal (UG) Geysers Borehole velocity Event triggered 1989-1998 Research account view PDF Plots
MOBB (BK)
Monterey Ocean Bottom Broadband Observatory
Monterey Bay Ocean bottom seismometer Event triggered 1997; 2002-present Research account view PDF Plots
SAFOD (SF)
San Andreas Fault Observatory at Depth
Parkfield area Borehole sensors Event triggered 2002-present (various periods) Searchable Web interface view PDF Plots

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Global Positioning System (GPS)

Data from the BARD network of continuous-monitoring GPS receivers are archived at the NCEDC. An effort is currently underway to archive survey-mode GPS data in the Western United States, primarily from the USGS. - More information

GPS
Network/Authority Region Mode Data types Time period Access
BARD Northern California Continuous Raw, RINEX, and Site logs 1992-present FTP
USGS continuous GPS SF Bay Area Continuous Raw, RINEX, and Site logs 2012-present-present FTP
USGS survey-mode GPS Western US Survey Raw, RINEX, and Site logs 1992-present FTP

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Other Geophysical Data

Fault-monitoring data from the USGS and its collaborators is one of the newest data sets at the NCEDC. In addition to this data, some sites in the BK network have additional geophysical sensors. In particular, the mini-Plate Boundary Observatory Project is a deployment of strain meters, borehole seismometers, and continuous GPS. - More information

Other Geophysical Data
Network/Authority Region Data types Time period Access Documents
USGS fault monitoring (UL) Primarily California Strain, creep, magnetic field, etc. 1975-present Searchable Web interface

Cleaned data

BK Northern California Temperature, pressure, strain, electric field, magnetic field 1994-present Searchable Web interface
PB Western United States Strain and environmental data 2005-present Searchable Web interface (not yet!)

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Synthetic Aperature Radar

The Western north America Interferometric Synthetic Aperature Radar Consortium (WInSAR) represents a collection of universities and public agencies in the acquisition and archiving of synthetic aperture radar (SAR) data. Scenes are only available to member institutions. - More information

WInSAR
Network/Authority Region Data types Time period Access
WInSAR North America Synthetic Aperature Radar scenes ????-present Searchable web interface, text (Restricted access to scenes)

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Current Earthquakes | Catalogs | Seismograms
GPS | Other geophysical data | Synthetic Aperature Radar