Physics
Scientific paper
Dec 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970pepi....4...49a&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 4, Issue 1, p. 49-61.
Physics
7
Scientific paper
The energies of free oscillations and long-period surface waves are studied. Two great earthquakes, the Kurile Islands earthquake of October 13, 1963 (M = 8.25) and the Alaskan earthquake of March 28, 1964 (M = 8.5), are investigated. Normal mode solutions and excitation functions of free oscillations for a spherical, self-gravitating Gutenberg-Bullen A model are used for the theoretical interpretation. Dipolar point sources on shear faults with arbitrary dip angles are considered. From direct comparisons between the experimental and theoretical free oscillation amplitudes, the seismic moments are determined to be 7.5 × 1028 dyne . cm for the Kurile Islands earthquake and 7.6 × 1029 dyne . cm for the Alaskan earthquake. For order numbers from 10 to 15, the energy contained in spheroidal modes excited by the Alaskan earthquake is nearly two orders of magnitude larger than that of the Kurile Islands earthquake. The surface wave energies are also estimated for a period range 20 to 600 s. The effect of the finiteness of the source is considered. The total energies of surface waves are estimated as 3.0 × 1023 erg for the Kurile Islands earthquake and 4.5 × 1024 erg for the Alaskan earthquake. The energy spectrum densities of surface waves are also evaluated for each mode
No associations
LandOfFree
Determination of seismic moment and energy from the Earth's free oscillation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Determination of seismic moment and energy from the Earth's free oscillation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of seismic moment and energy from the Earth's free oscillation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1005747