The newest observational evidence on asymmetrical deformation of the Earth
| Autor: | Jian-xin Zhu, Zong-jin Ma, Li-ren Huang |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Equator
Northern Hemisphere International Earth Rotation and Reference Systems Service Deformation (meteorology) Geotechnical Engineering and Engineering Geology Geodesy Earth radius Physics::Geophysics Geophysics Physics::Space Physics Very-long-baseline interferometry Astrophysics::Earth and Planetary Astrophysics Longitude Southern Hemisphere Physics::Atmospheric and Oceanic Physics Seismology Geology |
| Zdroj: | Acta Seismologica Sinica. 15:210-213 |
| ISSN: | 1993-1344 1000-9116 |
| DOI: | 10.1007/s11589-002-0010-5 |
| Popis: | Based on the coordinates, velocities and their error estimations of 595 GPS, SLR and VLBI stations issued by IERS in March 2001, the current asymmetrical deformation of the Earth is studied. The results show that the northern hemisphere of the Earth is undergoing compressive deformation, and the southern hemisphere is undergoing extensional deformation with the equator as the boundary. If the longitude line of 90°E and 90°W is taken as the boundary, the Pacific hemisphere (with 180° as its central longitude) is undergoing compressive deformation, and the Atlantic hemisphere (with 0° as its central longitude) is undergoing extensional deformation. The deformation patterns indicate again that the Earth is undergoing some dual-asymmetrical deformation. Moreover, taking 6 366.740 km as the standard mean curvature radius of the Earth, the velocity of volume change calculated from the data of space geodesy is 6.65×1011 m3/a. |
| Databáze: | OpenAIRE |
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