Earthquake catalogs |
Magnetic Activity |
The NCEDC supports several different tools for accessing data.
When you use data from the NCEDC, please provide a
of the data source.
This document describes the data collection by access tool. Other
documents describe the data by contributing
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.
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
Several catalogs at the NCEDC are only available as flat files
The Townley-Allen catalog is available only by FTP:
- 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
- Requesting data by channel and time
- Requesting data by event
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
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)
Data from the BARD network of continuous GPS sites and USGS surveys are
available via anonymous FTP
- Magnetic Activity and Shumann Resonance
- Interferometric Synthetic Aperature Radar (InSAR)