IV.—The Electric Field in Terrestrial Magnetic Storms
The paper which follows is based in the main on the magnetic records of the observatories at Lerwick (Shetland) and Eskdalemuir (Dumfriesshire), though reference is made to the data of Abinger (Surrey), Sitka (Alaska), Sodankylä (Finland), Colaba (Bombay), and Mauritius, and to records made at diffe...
| Published in: | Transactions of the Royal Society of Edinburgh |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Cambridge University Press (CUP)
1932
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0080456800016641 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0080456800016641 |
| Summary: | The paper which follows is based in the main on the magnetic records of the observatories at Lerwick (Shetland) and Eskdalemuir (Dumfriesshire), though reference is made to the data of Abinger (Surrey), Sitka (Alaska), Sodankylä (Finland), Colaba (Bombay), and Mauritius, and to records made at different times at Arctic and Antarctic stations. The situation of the Lerwick observatory, just within the auroral zone, might be expected to give to its records an outstanding value in any investigation connected with magnetic storms; the expectation has not been disappointed. The distance between Abinger and Eskdalemuir is about 470 km., and between Eskdalemuir and Lerwick about 550 km.—both quantities small compared with the dimensions of the earth—yet the mean ranges of disturbance at these three places appear to run roughly in the ratio 1:2: 4½. This at once suggests that in the extreme north of the British Isles we approach a zone of exceptional interest from the point of view of magnetic disturbance; and further,-that with suitable magnetic data some attempt might be made to compute the disturbing electric fields, at least in their main features, and possibly to arrive at some idea of any seasonal and annual changes to which these fields may be subject. |
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