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SeismicQof the lunar upper mantle

Authors :
Yosio Nakamura
Junji Koyama
Source :
Journal of Geophysical Research: Solid Earth. 87:4855-4861
Publication Year :
1982
Publisher :
American Geophysical Union (AGU), 1982.

Abstract

Shallow moonquake data are used to determine the frequency dependence of Q values for both compressional and shear waves in the upper mantle of the moon at frequencies between 3 and 8 Hz. The seismic P wave Q is estimated to be at least 4000 and is nearly independent of frequency or decreases slightly with increasing frequency, while the S wave Q increases from at least 4000 at 3 Hz to at least 7000 at 8 Hz. The rate of increase of Q(S) is approximately proportional to the 0.7 + or - 0.1 power of the frequency above 5 Hz. With the absence of other dissipation mechanisms, compressional heat loss may be a dominant factor in the lunar interior. Uncertainty remains, however, in the absolute values of Q's owing to the largely unknown detailed structure of the lunar upper mantle.

Details

ISSN :
01480227
Volume :
87
Database :
OpenAIRE
Journal :
Journal of Geophysical Research: Solid Earth
Accession number :
edsair.doi...........1fc052b12a9f1f8a08b756b57d954d15
Full Text :
https://doi.org/10.1029/jb087ib06p04855