Show me the data
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
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- Online catalog searches
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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/CNSS
participants is also available.
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.
- Text files
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Several catalogs at the NCEDC are only available as flat files
- FTP
- The Townley-Allen catalog is available only by FTP:
- Waveform data
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- DART (Real-Time Data)
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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
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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
- Requesting data
Help on using these tools is available.
- Non-SEED format data
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Until recently, NC data were not available in SEED format and the
only Web-acess tool was EVT_FAST:
However, as of 11/11/2004,
the NC data conversion project was completed and these data are now available
in SEED using tools such as
SeismiQuery and
NetDC.
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)
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- FTP
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Data from the BARD network of continuous GPS sites and USGS surveys are
available via anonymous FTP
- BARD
- Survey-mode
- GSAC
- Coming soon!
- Magnetic Activity and Shumann Resonance
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- Interferometric Synthetic Aperature Radar (InSAR)
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Northern California Earthquake Data Center
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Copyright 1995-2005, The Regents of the University of California.
Last modified: Fri Mar 7 12:09:02 PST 2008