Open AccessPolar motion, atmospheric angular momentum excitation and earthquakes‐correlations and significance
Author(s) -
Preisig Joseph R.
Publication year - 1992
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.1992.tb00847.x
Subject(s) - polar motion , amplitude , excitation , angular momentum , polar , earth's rotation , physics , geology , momentum (technical analysis) , geodesy , magnitude (astronomy) , interferometry , geophysics , seismology , astrophysics , classical mechanics , optics , astronomy , finance , quantum mechanics , economics
SUMMARY Equatorial atmospheric angular momentum (AAM) excitation functions and polar motion excitation functions (derived by Kalman filtering Very Long Baseline Interferometry polar motion estimates) are compared with the times of 1984‐mid‐1988 large earthquakes (magnitude greater than or equal to 7.5). There is a moderate correlation between times of large earthquakes and peaks in polar motion excitation. A strong correlation exists between the times of large earthquakes and large peaks in equatorial AAM amplitude; such a correlation is evident for six out of the eight large earthquakes occurring over the studied time interval. The AAM results indicate potential for the temporal prediction of large/great earthquakes.