On the local character of the geomagnetic pulsation, Pc.
It is well known that Pc type pulsation occurs simultaneously in the world-wide region. The author studied the results observed by induction magnetometers at the Japanese four stations (Memanbetsu, Onagawa, Simosato and Kanoya). From the results of the studies, local inequality of Pc was found. Period or mode of Pc changes with latitude, and amplitude of Pc becomes larger with increasing latitude. Such local Pc type pulsation may be produced by the hydromagnetic oscillations in the region between the inner Van Allen Belt and ionosphere. Two mode of oscillations exist in this region, toroidal and poloidal oscillation. In the higher latitude the poloidal and toroidal oscillations are observed; in the lower latitude only the poloidal oscillation is observed. Therefore, local Pc occurs frequently in the higher latitude than in the lower latitude.
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| Format: | Journal Contribution biblioteca |
| Language: | English |
| Published: |
1960
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| Online Access: | http://hdl.handle.net/1834/16929 |
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