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| Titel |
Deformation pattern of the 6 and 7 April 2009, MW=6.3 and MW=5.6 earthquakes in L'Aquila (Central Italy) revealed by ground and space based observations |
| VerfasserIn |
I. D. Papanikolaou, M. Foumelis, I. Parcharidis, E. L. Lekkas, I. G. Fountoulis |
| 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 ; 10, no. 1 ; Nr. 10, no. 1 (2010-01-14), S.73-87 |
| Datensatznummer |
250007877
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| Publikation (Nr.) |
 copernicus.org/nhess-10-73-2010.pdf |
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| Zusammenfassung |
| The deformation pattern of the 6 and 7 April 2009 MW=6.3 and
MW=5.6 earthquakes in L'Aquila is revealed by DInSAR analysis and compared
with earthquake environmental effects. The DInSAR predicted fault surface
ruptures coincide with localities where surface ruptures have been observed
in the field, confirming that the ruptures observed near Paganica village are
indeed primary. These ruptures are almost one order of magnitude lower than
the ruptures that have been produced by other major surrounding faults in the
past. These faults have not been activated during the 2009 event, but have
the capacity to generate significantly stronger events. DInSAR analysis shows
that 66% (or 305 km2) of the area deformed has been subsided whereas the
remaining 34% (or 155 km2) has been uplifted. A footwall uplift versus
hangingwall subsidence ratio of about 1/3 is extracted from the mainshock.
The maximum subsidence (25 cm) was recorded about 4.5 km away from the
primary surface ruptures and about 9 km away from the epicentre. In the
immediate hangingwall, subsidence did not exceeded 15 cm, showing that the
maximum subsidence is not recorded near the ruptured fault trace, but closer
to the hangingwall centre. The deformation pattern is asymmetrical expanding
significantly towards the southeast. A part of this asymmetry can be
attributed to the contribution of the 7 April event in the deformation field. |
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