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| Titel |
Anomalous radon emanation linked to preseismic electromagnetic phenomena |
| VerfasserIn |
Y. Omori, Y. Yasuoka, H. Nagahama, Y. Kawada, T. Ishikawa, S. Tokonami, M. Shinogi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 7, no. 5 ; Nr. 7, no. 5 (2007-10-26), S.629-635 |
| Datensatznummer |
250004739
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| Publikation (Nr.) |
 copernicus.org/nhess-7-629-2007.pdf |
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| Zusammenfassung |
| Anomalous emanation of radon (222Rn) was observed preceding large
earthquakes and is considered to be linked to preseismic electromagnetic
phenomena (e.g. great changes of atmospheric electric field and ionospheric
disturbances). Here we analyze atmospheric radon concentration and estimate
changes of electrical conditions in atmosphere due to preseismic radon
anomaly. The increase of radon emanation obeys crustal damage evolution,
following a power-law of time-to-earthquake. Moreover, the radon emanation
decreases the atmospheric electric field by 40%, besides influencing the
maximum strength of atmospheric electric field by 104–105 V/m
enough to trigger ionospheric disturbances. These changes are within the
ranges observed or explaining electromagnetic phenomena associated with
large earthquakes. |
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