Accession Number:

AD0774458

Title:

LASA Regional Travel-Time Corrections and Associated Nodes

Descriptive Note:

Technical rept.

Corporate Author:

TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA ANALYSIS CENTER

Personal Author(s):

• Chiburis, E. F.
• Ahner, R. O.

Report Date:

1973-10-09

Pagination or Media Count:

37.0

Abstract:

A new set of region corrections has been generated for LASA which more adequately covers the seismically active area of the earth than did previous sets. The new set contains 183 calibration nodes versus 105 nodes on the set used in the SDACLASA system throughout 1972 and the first half of 1973. Each mode contains the average relative travel-time anomalies for each of the 21 subarrays at LASA which are valid over an area surrounding the location of the node. The corrections were generated from more than 1800 events using as a primary source of data the time shifts resulting from the crosscorrelation process in the SDACLASA Event Processor.

Descriptors:

• *SEISMIC DETECTION
• *SEISMOLOGICAL STATIONS
• ANOMALIES
• BEAM STEERING
• CALIBRATION
• CORRECTIONS
• CORRELATION TECHNIQUES
• DATA PROCESSING
• EARTHQUAKES
• MONTANA
• NUCLEAR EXPLOSIONS
• SEISMIC ARRAYS
• SEISMIC DATA
• TRAVEL TIME

Subject Categories:

• Seismology
• Seismic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE