 |
| Titel |
Enhanced ULF radiation observed by DEMETER two months around the strong 2010 Haiti earthquake |
| VerfasserIn |
M. A. Athanasiou, G. C. Anagnostopoulos, A. C. Iliopoulos, G. P. Pavlos, C. N. David |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 4 ; Nr. 11, no. 4 (2011-04-11), S.1091-1098 |
| Datensatznummer |
250009341
|
| Publikation (Nr.) |
 copernicus.org/nhess-11-1091-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| In this paper we study the energy of ULF electromagnetic waves that were
recorded by the satellite DEMETER, during its passing over Haiti before and
after a destructive earthquake. This earthquake occurred on 12 January 2010, at
geographic Latitude 18.46° and Longitude 287.47°, with Magnitude
7.0 R. Specifically, we are focusing on the variations of energy of
Ez-electric field component concerning a time period of 100 days before and
50 days after the strong earthquake. In order to study these variations, we
have developed a novel method that can be divided in two stages: first we filter
the signal, keeping only the ultra low frequencies and afterwards we
eliminate its trend using techniques of Singular Spectrum Analysis (SSA), combined with a third-degree polynomial filter. As it is shown, a
significant increase in energy is observed for the time interval of 30 days
before the earthquake. This result clearly indicates that the change in the
energy of ULF electromagnetic waves could be related to strong precursory
earthquake phenomena. Moreover, changes in energy associated with strong aftershock activity were also observed 25 days
after the earthquake. Finally, we
present results concerning the comparison between changes in energy during
night and day passes of the satellite over Haiti, which showed differences
in the mean energy values, but similar results as far as the rate of the
energy change is concerned. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|