Help and Documentation
FAQ |
Search |
Data |
Tools |
Formats
Station Info |
Users Guide |
Database |
Conversions |
Reports
Frequently Asked Questions (FAQ)
Need some help? A good place to start is our Frequently Asked Questions page. This page is under development, but we are have started the process of gathering common questions and compiling answers.Search the NCEDC Web site
If you can't find something, try the NCEDC search option. It allows the user to specify keys words and will return a sorted list of matching pages. As with all search engines, your choice of key words is important.Data Collections
These pages provide starting points for retrieving data from the NCEDC.Data Access Tools
- Earthquake Catalogs
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The NCEDC provides online search capabilities for the northern California
earthquake catalogs of the USGS and BSL:
and for the worldwide earthquake catalog of the ANSS:
- Waveform data
- A general overview of tools for accessing SEED format data is available: This page describes tools for querying inventory and requesting SEED waveform da ta. Help on specific tools includes: Data from the NC network is available over the Web using a request form: To access other waveform data, a research account is required.
Data Formats
- Earthquake Catalogs
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Catalog and phase files at NCEDC are stored and retrieved in different
formats for each data set. Overviews are available for the following
catalogs:
These are the current formats supported by the NCEDC:
- "Readable" catalog format
- NCSN raw catalog & phase format
- NCSN raw Focal Mechanisms (first motion FPFIT)
- UCB raw catalog format
- UCB raw phase format
- ANSS/CNSS raw catalog format
- Waveform data
- There are commonly used time series file formats used by the the seismological community.
Station information
Information concerning the location of seismic and geodetic stations, including locations, operating times, and instrument responses.Research Account Users Guide
This Users Guide describes how users with research acccounts can use the data center. It is available in several formats:Database Project
The NCEDC has a developed a schema for earthquake data in collaboration with the TriNet project in southern California.Useful Conversions
The NCEDC is putting together a conversion utility for common calculations. It will include conversions (and their inverses) from kilometers to miles, year and day of year to year, month, and day and other helpful computations for retrieving data.NCEDC Background and Reports
Information about the operation of the NCEDC is available from the Annual Reports of the Berkeley Seismological Lab:
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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: Mon Dec 17 17:31:07 PST 2007