What question did this study set out to answer?

To measure and characterize the frequencies, overtones, and damping values of Earth's spheroidal free oscillations triggered by the 1964 Alaskan earthquake.

January 26, 2010Geophysical Journal of the Royal Astronomical SocietyOpen Access

Spherical Oscillations of the Earth*

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Authors

LSL. B. SlichterJet Propulsion Laboratory

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Implication

Observational study reveals high-precision spheroidal free oscillations across Earth following an Alaskan earthquake, indicating refined constraints on planetary interior structure.

Key Points

To measure and characterize the frequencies, overtones, and damping values of Earth's spheroidal free oscillations triggered by the 1964 Alaskan earthquake.
Recorded seismic data using two advanced instruments operating at UCLA following the March 27, 1964 Alaskan earthquake.
Computed frequency spectra using two independent mathematical techniques and peak-determination interpolation formulas.
Identified fine-structure multiplets and their relative excitation using energy considerations.
Cataloged spheroidal free oscillation modes from 0S0 to 0S41, yielding frequencies an order of magnitude more precise for low-degree modes than previous reports.
Achieved high-precision mode determinations, with independent estimates differing by 3 in 100,000 for 0S0 and 1.5 in 10,000 for 0S20.
Observed the fundamental radial mode 0S0, its first overtone 1S0, several additional overtones, and corresponding Q values.

Cite This Study

L. B. Slichter (2010) studied this question.

synapsesocial.com/papers/6a6df8aace524a4339c2dbeb https://doi.org/10.1111/j.1365-246x.1967.tb06234.x

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Implication

Observational study reveals high-precision spheroidal free oscillations across Earth following an Alaskan earthquake, indicating refined constraints on planetary interior structure.

Spherical Oscillations of the Earth*

Discussion

Member takes

Implication

Key Points

Cite This Study

Spherical Oscillations of the Earth*

Discussion

Member takes

Implication

Key Points

Cite This Study

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