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| Titel |
Mega-earthquake vs. small size seismic events: tradeoff and limits of Remote Sensing in the application of source parameters |
| VerfasserIn |
Salvatore Stramondo, Christian Bignami, Valentina Cannelli, Daniele Melini, Marco Moro, Marco Polcari, Sergey Samsonov, Michele Saroli, Paola Vannoli |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250091818
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| Publikation (Nr.) |
 EGU/EGU2014-6132.pdf |
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| Zusammenfassung |
| The aim of this work is to provide an overview of the capabilities and limitations of
Differential Interferometric SAR (DInSAR) technique to supply reliable information about
earthquakes over a very wide range of magnitudes, from mega-earthquakes (of magnitude 8+)
up to those reaching the lower limits of detection. The capability of DInSAR to detect surface
movements over large areas has been successfully used in seismology, where traditionally the
main topic of scientists is to determine the seismic source parameters, such as geometry and
slip distribution. In recent years some scientific reviews have been focused on defining the
thresholds of detection of a coseismic signal (i.e., surface deformation) and to investigate the
tradeoff magnitude-depth. An additional variable to provide reliable constraints
concerning the role of “remote sensing” is the available satellite system. Today
we may exploit the capabilities of VHR (very high resolution) SAR systems that
are addressed to investigate moderate size earthquakes at high sampling density.
Additionally, we may say to be in the middle between the past generation of SAR systems
(from ERS to Envisat) and the forthcoming Sentinel-1 missions that are specifically
addressed to the investigation of surface effects of major and medium size natural
disasters. This work will describe which role remote sensing and, in particular,
DInSAR had in the case of the March 11, 2011, Tohoku-Oki (Japan) earthquake (Mw
9.0), with particular emphasis on the retrieval of source parameters. On the other
side, we will focus on the June 21, 2013, Lunigiana (Northern Italy) earthquake
(Mw 5.3), which is only the last example of low magnitude events where, however,
DInSAR results are able to provide information relevant to seismological analyses. |
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