Integrated approach to seismic event location. 1. Evaluating how method of location affects the volume of groups of hypocenters. Technical report

Technical Report · Sat Dec 12 04:00:00 EST 1992

OSTI ID:6383742

Frohlich, C A

When seismic events occur in spatially compact clusters, the volume and geometric characteristics of these clusters often provides information about the relative effectiveness of different location methods, or about physical processes occurring within the hypocentral region. This report defines and explains how to determine the convex polyhedron of minimum volume (CPMV) surrounding a set of points. We evaluate both single-event and joint hypocenter determination (JHD) relocations for three rather different clusters of seismic events; (1) nuclear explosions from Mururoa relocated using P and PKP phases reported by the ISC; (2) intermediate depth earthquakes near Bucaramanga, Colombia, relocated using P and PKP phases reported by the ISC; and (3) shallow earthquakes near Vanuatu (formerly, the New Hebrides), relocated using P and S phases from a local station network. This analysis demonstrates that different location methods markedly affect the volume of the CPMV, however, volumes for JHD relations are not always smaller than volumes for single-event relocations.... Seismic event location, Seismic strain, Seismic discrimination.

• Research Organization: Texas Univ., Austin, TX (United States). Inst. for Geophysics
• OSTI ID: 6383742
• Report Number(s): AD-A-263211/5/XAB; CNN: F19628-91-K-0026
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450300* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosion Detection
COLOMBIA
DATA
DEPTH
DETECTION
DEVELOPING COUNTRIES
DIMENSIONS
EARTHQUAKES
ENERGY
EVALUATED DATA
EXPLOSIONS
HYPOCENTERS
INFORMATION
INFORMATION NEEDS
INTEREST GROUPS
LATIN AMERICA
NUCLEAR ENERGY
NUCLEAR EXPLOSION DETECTION
NUCLEAR EXPLOSIONS
NUMERICAL DATA
SEISMIC EVENTS
SOUTH AMERICA