Analytical comparison of geomagnetic total field between Sino-US stations |
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| Authors: | Zhijia Zhan Fuxin Yao M Johnston R Mueller and Jintian Gao |
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| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China;(2) Seismological Bureau of Yunnan Province, 650041 Kunming, China;(3) U. S. G. S., 94025 Menlo Park, CA, U. S. A. |
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| Abstract: | Using observational data of geomagnetic total intensity from 13 stations in the Beijing-Tianjin region, 3 stations in the
western Yunnan region of China, and 6 stations in California of U. S. A., the daily variations and their spectra of geomagnetic
total intensity were analyzed and compared. The results show that the morphology, the range and spectrum of daily variations
in geomagnetic total intensity are basically the same within the local extent of 100–200 km and are different in the large
extent of 500 km. The latitude factor of the daily variation range of geomagnetic total intensity is about 1–2 nT/degree within
the latitude extent of 25°–40°.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 83–89, 1992.
This work is supported by the State Seismological Bureau and the Chinese Joint Seismological Science Foundation, and U.S.
Geological Survey. |
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| Keywords: | geomagnetic total intensity geomagnetic daily variation and its spectrum Beijing— Tianjin area and western Yunnan area in China California in U S A |
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