Earthquake Displacement Fields and the Rotation of the Earth
Title | Earthquake Displacement Fields and the Rotation of the Earth PDF eBook |
Author | L. Mansinha |
Publisher | Springer Science & Business Media |
Total Pages | 313 |
Release | 2012-12-06 |
Genre | Science |
ISBN | 9401033080 |
The seeds of this conference were sown with the publication by Press, in 1965, of a paper in which he suggested that the displacement field due to a major earthquake may extend over much greater distances than had been thought possible before. Later on, Mansinha and Smylie pointed out that if Press was correct then, since the redistri bution of significant quantities of mass was involved, the inertia tensor of the earth would be altered and thus cause the earth to wobble; this revived the idea that earth quakes might be the long sought source for maintaining the Chandler Wobble. They argued that since earthquakes are sudden events it should be worthwhile trying to determine if there was any correlation between sudden changes in the Chandler term of the pole path and major earthquakes. Furthermore, since displacements occur both before and after an earthquake it might be possible to obtain a few days warning of a major earthquake by making instantaneous observations of the pole path. Analysis of the data indicated some correlation but, as often happens in science in general and in geophysics in particular, the results were not conclusive because of imperfect theory and the need for more accurate determinations of the pole position. It soon became clear that a meeting between geophysicists and astronomers involved in this type of work would be of mutual benefit.
Earthquake Displacement Fields and the Rotation of the Earth
Title | Earthquake Displacement Fields and the Rotation of the Earth PDF eBook |
Author | L. Mansinha |
Publisher | |
Total Pages | |
Release | 1987 |
Genre | |
ISBN |
Earthquake Displacement Fields and the Rotation of the Earth
Title | Earthquake Displacement Fields and the Rotation of the Earth PDF eBook |
Author | Nato advanced Study Institute. University of Western Ontario |
Publisher | |
Total Pages | 0 |
Release | 1970 |
Genre | Earth (Planet) |
ISBN |
Earthquake Displacement Fields and the Rotation of the Earth
Title | Earthquake Displacement Fields and the Rotation of the Earth PDF eBook |
Author | University of Western Ontario Dept. of Geophysics |
Publisher | |
Total Pages | 308 |
Release | 1970 |
Genre | |
ISBN |
Earthquake Displacement Fields and the Rotation of the Earth
Title | Earthquake Displacement Fields and the Rotation of the Earth PDF eBook |
Author | L. Mansinha |
Publisher | Springer |
Total Pages | 0 |
Release | 1970-07-31 |
Genre | Science |
ISBN | 9789027701596 |
The seeds of this conference were sown with the publication by Press, in 1965, of a paper in which he suggested that the displacement field due to a major earthquake may extend over much greater distances than had been thought possible before. Later on, Mansinha and Smylie pointed out that if Press was correct then, since the redistri bution of significant quantities of mass was involved, the inertia tensor of the earth would be altered and thus cause the earth to wobble; this revived the idea that earth quakes might be the long sought source for maintaining the Chandler Wobble. They argued that since earthquakes are sudden events it should be worthwhile trying to determine if there was any correlation between sudden changes in the Chandler term of the pole path and major earthquakes. Furthermore, since displacements occur both before and after an earthquake it might be possible to obtain a few days warning of a major earthquake by making instantaneous observations of the pole path. Analysis of the data indicated some correlation but, as often happens in science in general and in geophysics in particular, the results were not conclusive because of imperfect theory and the need for more accurate determinations of the pole position. It soon became clear that a meeting between geophysicists and astronomers involved in this type of work would be of mutual benefit.
Earthquake Displacement Fields and the Rotation of the Earth; a NATO Advanced Study Institute. Conference Organized by the Department of Geophysics, University of Western Ontario, London, Canada, 22 June-28 June 1969. Ed. by L. Mansinha, D.E. Smylie and A.E. Beck
Title | Earthquake Displacement Fields and the Rotation of the Earth; a NATO Advanced Study Institute. Conference Organized by the Department of Geophysics, University of Western Ontario, London, Canada, 22 June-28 June 1969. Ed. by L. Mansinha, D.E. Smylie and A.E. Beck PDF eBook |
Author | NATO Advanced Study Institute, University of Western Ontario, 1969 |
Publisher | |
Total Pages | 308 |
Release | 1970 |
Genre | Earth (Planet) |
ISBN |
Variations in Earth Rotation
Title | Variations in Earth Rotation PDF eBook |
Author | Dennis D. McCarthy |
Publisher | American Geophysical Union |
Total Pages | 197 |
Release | 1990 |
Genre | Science |
ISBN | 0875904599 |
Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 59. As part of the Nineteenth General Assembly of The International Union of Geodesy and Geophysics Symposium (IUGG) in Vancouver, Canada, Union Symposium U4, "Variations in Earth Rotation" was held August 18-19 1987. The Convenor was Dennis D. McCarthy, U.S. Naval Observatory with P. Paquet, Observatoire Royal de Belgique and M. G. Rochester, St. Johns University serving as co-convernors. In a session on internal structure of the Earth papers dealt with the geophysical effects on Earth rotation parameters. Mantle anelasticity increases the free core nutation (FCN) period by a few days. The period of the FCN and the amplitudes of the main nutation components are sensitive to the ellipticity of the core?]mantle boundary (CMB), and a non-hydrostatic increase of 400m in the flattening of the CMB is a possible explanation of the discrepancies from theory. An alternative suggestion rests on the subseismic description of the nutation spectrum of the stratified liquid core. Evidently new models will have to take into account contributions from the oceans, mantle anelasticity, non-hydrostatic pre-stress, CMB topography and internal core structure.