Abstract
abstract All observations of the free oscillations of the Earth published through 1968 are weighted to produce a set of means and standard errors of the means. Fundamental orders 0 to 97 for spheroidal and 2 to 99 for torsional are treated, as well as many overtones up to order 49. Statistical tests indicate that some observations are path dependent at the 99 per cent confidence level. Comparison of these means and standard errors with published Earth models indicate that they form a consistent basis for inversion of free oscillation observations to infer Earth structures.
Keywords
Oscillation (cell signaling)Inversion (geology)Basis (linear algebra)MathematicsGeologyGeodesyStatistical physicsGeophysicsPhysicsGeometrySeismologyChemistry
Affiliated Institutions
Related Publications
High-Q Overtone Modes of the Earth
Overtone modes of free oscillation of the Earth have been observed with two instruments at two separate locations after the Colombian earthquake of July 31, 1970. Certain overto...
Observations of Normal Modes from 84 Recordings of the Alaskan Earthquake of 1964 March 28
We have taken 84 World Wide Standard Seismograph Network recordings of the Alaskan earthquake of 1964 March 28, one of the largest earthquakes in history, and have made an inten...
Earth Structure from Free Oscillations and Travel Times
An extensive set of reliable gross Earth data has been inverted to obtain a new estimate of the radial variations of seismic velocities and density in the Earth. The basic data ...
An application of normal mode theory to the retrieval of structural parameters and source mechanisms from seismic spectra
A cyclic process of refining models of the mechanical structure of the Earth and models of the mechanism of one or more earthquakes is developed. The theory of the elastic-gravi...
Estimation of surface focus<i>P</i>travel times
Abstract An iterative technique was used to locate some 400 earthquakes, estimate corrections to the Jeffreys-Bullen P travel times and estimate azimuthally dependent station ad...
Publication Info
- Year
- 1969
- Type
- article
- Volume
- 59
- Issue
- 5
- Pages
- 2079-2099
- Citations
- 57
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
57
OpenAlex
Cite This
John S. Derr
(1969).
Free oscillation observations through 1968.
Bulletin of the Seismological Society of America
, 59
(5)
, 2079-2099.
https://doi.org/10.1785/bssa0590052079
Identifiers
- DOI
- 10.1785/bssa0590052079