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| Titel |
Ionospheric variations before some large earthquakes over Sumatra |
| VerfasserIn |
A. M. Hasbi, M. A. Mohd Ali, N. Misran |
| 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 ; 11, no. 2 ; Nr. 11, no. 2 (2011-02-22), S.597-611 |
| Datensatznummer |
250009171
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| Publikation (Nr.) |
 copernicus.org/nhess-11-597-2011.pdf |
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| Zusammenfassung |
| The paper investigates the ionospheric variations before some large
earthquakes that occurred during 2004–2007 in Sumatra using
GPS and CHAMP data. The TEC shows the occurrence of positive and negative
anomalies detected within a few hours to 6 days before the earthquakes.
These anomalies mostly occur during the daytime hours between 4 and 17 LT.
The TEC anomalies are mostly consistent with the CHAMP satellite electron
density data. The electron density analysis over the 28 March 2005
earthquake epicenter shows that an equatorial anomaly modification took
place a few days before the event. The modification took shape in the form
of crest amplification during the daytime. The comparison between the TEC
and electron density measurements during very quiet geomagnetic conditions
is shown to be a useful indicator of a forthcoming earthquake. |
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