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| Titel |
Preseismic ULF electromagnetic effect from observation at Kamchatka |
| VerfasserIn |
O. Molchanov, A. Schekotov, E. Fedorov, G. Belyaev, E. Gordeev |
| 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 ; 3, no. 3/4 ; Nr. 3, no. 3/4, S.203-209 |
| Datensatznummer |
250000678
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| Publikation (Nr.) |
 copernicus.org/nhess-3-203-2003.pdf |
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| Zusammenfassung |
| Some results of ULF
magnetic field observation at Karimshino site (Kamchatka, Russia) since
June 2000 to September 2001 are presented here. Using case study we have
found an effect of suppression of ULF intensity about 2–6 days before
rather strong and nearby seismic shocks (magnitude M = 4.0 – 6.2). It is
revealed for nighttime and horizontal component of ULF field (G) in the
frequency range 0.01 – 0.1 Hz. Then we prove the reliability of the effect
by computed correlation between G (or 1/G) and specially calculated
seismic indexes Ks for the whole period of observation. Basing on the
simple criteria we conclude that reliability of seismo-associated ULF
suppression effect is comparable with well-known effect of connection
between ULF variation and Kp index of global magnetic activity. It seems
the reason of suppression is located at the atmosphere or ionosphere but
not in the ground medium. |
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