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.
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.
These pages provide starting points for retrieving data from
Station Info |
Users Guide |
- Earthquake Catalogs
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
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.
Information concerning the location of seismic and geodetic stations,
including locations, operating times, and instrument responses.
This Users Guide describes how users with research acccounts
can use the data center. It is available in several formats:
The NCEDC has a developed a schema for earthquake data in collaboration
with the TriNet project in southern California.
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.
Information about the operation of the NCEDC is available
from the Annual Reports
of the Berkeley Seismological Lab:
Catalog and phase files at NCEDC are stored and retrieved in different
formats for each data set. Overviews are available for the following
These are the current formats supported by the NCEDC:
There are commonly used time series file formats used by the the