PNSN Earthquake Catalogs

A catalog consists of summary lines, usually one line per earthquake, giving earthquake time, location, and magnitude.

Basic Information on Catalogs - Earthquake magnitudes, quality factors, UTC time, and Catalog updating frequency.
Catalog Completeness varies geographically, and over time. Better instrumentation improves catalog completeness.

CATALOG SEARCHES: 1970 - Present - Set search parameters and get a list of earthquakes that meet your criteria.

Custom Search - from the ANSS

PNSN CATALOGS OF INSTRUMENTALLY LOCATED QUAKES - 1970-present, updated frequently. There is one "summary" line for each earthquake, and one file of "summary" lines for each year.

Complete summary Line Format - Description of summary card fields
Catalog Format - Slightly more user-friendly version
ftp Annual files loc.70, loc.71, loc.72 .... loc.98, loc.99, loc.00, etc.

PNSN CATALOGS OF EARLIER QUAKES - Information from "felt" reports, paleoseismicity, and Native traditons

The circa 900 AD Seattle Fault earthquake (M ~ 7.4) Known from paleoseismology and Native traditions
The January 1700 Cascadia Earthquake (M 9+) Known from paleoseismology and Native traditions
Cascadia Catalog 1793-1929 A compilation of historic records and early earthquake catalogs for Washington, Oregon, and southern British Columbia.
USGS Reports 1928-1970 Washington and Oregon Earthquake Reports from "United States Earthquakes, U.S. Department of Commerce, Coast and Geodetic Survey". After 1929, the US government systematically collected reports of felt earthquakes through reports from postmasters.

PNSN CATALOG OF LARGER QUAKES - Magnitude 3.0 or greater, 1872 - present. For older dates, only the largest quakes are listed.

loc.EQ.M_gt_3. - see Summary Line Format
loc.EQ.M_gt_3_simsum - More Readable format

GLOBAL EARTHQUAKE CATALOG SEARCH - From USGS NEIC

This is file /SEIS/PNSN/CATDAT/catalog.html, last modified 7/31/02