Waveform data from the GSN and ANSS backbone are transmitted from the station to the USGS National Earthquake Information Center in near-real time, where they are used for rapid earthquake response.  A small number of stations do not have telemetry, and data from those sites are transmitted to the USGS via media such as tapes or CDs.  As part of GSN and backbone operations, waveform data are reviewed during quality control.  GSN and backbone data are available from the IRIS Data Management Center.

The ASL has scanned a small subset of the WWSSN records and a number of these are available at the IRIS Data Management Center through the Searchable Product Depository.

Available data:

Data available from IRIS - Information on how to access data from the IRIS Data Management Center

Instrument response information

Probability Density Function plots:

Examples:

Travel Time Dataset
A dataset compiled during the QC operations at the ASL

New Mexico Earthquakes
The January 4, 1998 Magnitude 3.8 earthquake, approximately 3 miles south of Willard, New Mexico.

Texas Earthquake
A magnitude 3.6 earthquake which occurred in West Texas at 10:33:42 on April 15, 1998 (4:33:42 am Mountain Daylight Time). The earthquake is recorded on the third trace from the top, about halfway across the page.

Utah Earthquake
A magnitude 3.8 earthquake which occurred in southern Utah at 11:00:40 on June 18, 1998 (05:00:40 am Mountain Daylight Time). The earthquake is recorded on the eighth trace from the top, near the left edge of the page.

Small explosion
A small test explosion on Kirtland Air Force Base (where ANMO station is located) at about 16:38 on May 28, 1998 (10:38 am Mountain Daylight Time). The explosion is recorded on the ninth trace from the top, about halfway across the page. These small test explosions are a routine occurrence on the Air Force base. The recording shows a large oscillation from the blast and then returns to normal almost immediately (unlike an earthquake).