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The NCEDC supports several different tools for accessing data. When you use data from the NCEDC, please provide a proper acknowledgement of the data source.

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

Earthquake catalogs

Online catalog searches

Earthquake catalogs for Northern California produced by the USGS and the Berkeley Seismological Lab may be searched using a Web interface. A global earthquake catalog produced from contributions from ANSS participants is also available.

• Northern California
• Worldwide

We've recently supplemented the general catalog searches with a new interface that allows the user to select one of several output maps in addition to the list of events. Several catalogs may be accessed.

• Catalog search with maps

Text files

Several catalogs at the NCEDC are only available as flat files

• 1995-1998 Geysers catalog
• 1987-1998 Parkfield catalog
• 1988-current moment tensor catalog

FTP

The Townley-Allen catalog is available only by FTP:

• ANSS Worldwide
• Townley-Allen catalog

Waveform data

DART (Real-Time Data)

DART (Data Available in Real Time) is a buffer of real-time telemetry MiniSEED data that is accessible directly from the web or through data retrieval tools which will be available in near future.

SEED format data

Data from the BP (2001-present), BK, NC, NN, PB, SF, and UL networks are available in SEED format Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.

• Querying the archives
  • SeismiQuery at the NCEDC
  • NetDC Request Form
• Requesting data by channel and time
  • NetDC Request Form
• Requesting data by event
  • EVT_FAST request for NC data

Help on using these tools is available.

Non-SEED format data

Data from the UG and older BP data are not currently available in SEED format. Other non-SEED data may be accessed through a research account

Raw data from the PBO strainmeters in the bottle (borehole strain meters or bsm) and ice9 (laser strainmeters or lsm) are available via the file system for your perusal.

Global Positioning System (GPS)

FTP

Data from the BARD network of continuous GPS sites and USGS surveys are available via anonymous FTP

• BARD
  • Low-rate raw
  • Low-rate rinex
  • High-rate raw
  • High-rate rinex
• Survey-mode
  • Raw data
  • Original RINEX

GSAC

Coming soon! GSAC main page at UCSD
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Magnetic Activity and Shumann Resonance

• Information about the electromagnetic observatories
• Information about the computations
• Results

Interferometric Synthetic Aperature Radar (InSAR)

• UC Berkeley archive

Northern California Earthquake Data Center 215 McCone Hall, UC Berkeley Berkeley CA 94720-4760 www@ncedc.org

Copyright 1995-2005, The Regents of the University of California.
Last modified: Wed Apr 25 18:44:22 PDT 2012