Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7426
Authors: | De Martino, S.* Falanga, M.* Palo, P.* Montalto, P.* Patanè, Domenico* |
Title: | Statistical analysis of the volcano seismicity during the 2007 crisis | Journal: | Journal of Geophysical Research | Series/Report no.: | /116 (2011) | Publisher: | AGU | Issue Date: | 2011 | DOI: | 10.1029/2010JB007503 | Keywords: | Volcanic tremor Stromboli |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology | Abstract: | We analyze the volcano seismicity recorded during the pre‐ and co‐eruptive regimes of the 2007 effusive crisis at Stromboli volcano (Italy). Data‐set is composed of the continuous recordings of a three‐component broad‐band seismometer and of a Sacks‐ Evertson strainmeter. Starting from the characterization of the non effusive phase as a stationary state of equilibrium, we investigate the effusive phase as a non‐equilibrium state. A statistical analysis reveals that the explosion occurrence is always driven by a nearly Poissonian process, as for the standard activity, even during the effusive phase, with the only difference in shortening the inter‐times. Explosion‐quake amplitudes are lognormally distributed until the effusive phase, becoming then broader. This indicates that many scales are involved. A slightly different process can be advocated for the swarms of the explosions occurring during the effusive phase. This suggests that the dynamics of the exsolution and/or aggregation of the gas slugs should differ from the nucleation mechanism responsible of the standard Strombolian activity. The pre‐eruptive regime is characterized by a very long deformative signal that appears as a transient oscillating signal with a period of about three days that modulates the explosion amplitudes. In a conceptual vibrating cavities model, it is related to a chocking phenomenon induced by magma injection, which in turn leads to the effusion. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
2011_DeMartino et al.pdf | 10.38 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
20
10
checked on Feb 10, 2021
Page view(s)
192
checked on Mar 27, 2024
Download(s)
15
checked on Mar 27, 2024