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| Titel |
Some insights on the long-period seismicity at Campi Flegrei from polarization analysis |
| VerfasserIn |
Mariarosaria Falanga, Simona Petrosino |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250035150
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| Zusammenfassung |
| In this contribution we analyse long-period (LP) events and
seismic noise recorded at Campi Flegrei during the uplift episode
of 2005-2006. The results of a detailed polarization analysis
indicate that the seismic signal recorded during the crisis is
characterized by the presence of low-energy coherent wave packets
that are absent in the ambient noise usually recorded in the area.
The low-energy coherent wave-packets and the LP events are
characterized by similar properties, namely they are radially
polarized towards the LP source. On the basis of these
observations, we propose a possible mechanism that could have
driven the seismic crisis, and we interpret both the low-energy
coherent seismic signals and the LPs in the framework of a
nonlinear theory, describing the self-oscillations generated by a
persistent hydrothermal source. |
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