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| Titel |
Space conditions during a month of a sequence of six M > 6.8 earthquakes ending with the tsunami of 26 December 2004 |
| VerfasserIn |
G. Anagnostopoulos, A. Papandreou |
| 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 ; 12, no. 5 ; Nr. 12, no. 5 (2012-05-21), S.1551-1559 |
| Datensatznummer |
250010820
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1551-2012.pdf |
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| Zusammenfassung |
| This paper examines space and seismological data for the
time period about one month before the giant Sumatra-Andaman strong (9.3)
earthquake (EQ). The combination of seismological and space data
reveals some interesting features for this time period: (1) six successive
high speed solar wind streams obviously triggering a sudden increase of
geomagnetic activity were all followed by strong to giant (M > 6.8) EQs,
(2) the 6 strong EQs present certain spatial-temporal constraints, with the
epicentre of the EQs occuring at the edges of the Pacific Plate (the Sumatra-Andaman
EQ occurred at the end of this series of EQs, eastward of the
first one), in a clockwise direction, (3) the EQs occurred after a sudden
increase of geomagnetic activity, as inferred from the 3 h-Kp index,
following a quiet geomagnetic period and (4) the time delay of the M > 6.2
earthquakes (in the broad area examined) from the last maximum sudden Kp
increase was on average ~1.5 days.
These findings from the study of the Earth's space environment during the
month preceding the Sumatra-Andaman giant (9.3) EQ provide new
information for a possible better understanding of the
Sun-magnetosphere-lithosphere coupling. |
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