Accession Number:

AD0776005

Title:

Post-Doctoral Research in Seismology

Descriptive Note:

Final rept. 1 Jul 1966-31 Aug 1973

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH ATMOSPHERIC AND PLANETARY SCIENCES

Personal Author(s):

• Press, Frank
• Toksoz, M. Nafi
• Mendiguren, Jorge

Report Date:

1973-08-31

Pagination or Media Count:

55.0

Abstract:

This final annual report describes the work of Jorge Mendiguren on the identification of free oscillation spectral peaks by the new powerful method called excitation criterion. An intensive search of higher modes was done using data for the July 30, 1970 Colombian deep shock. Spheroidal oscillations, ranging from the fundamental to the sixth higher overtone, and torsional oscillations up to the third higher overtone were identified. Spheroidal oscillations for periods smaller than 100 seconds were clearly identified for the third and fifth overtone.

Descriptors:

• *EARTHQUAKES
• *SEISMOLOGY
• EARTH MANTLE
• OSCILLATION
• SCIENTIFIC RESEARCH
• SEISMIC WAVES
• STRUCTURAL GEOLOGY

Subject Categories:

• Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE