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http://hdl.handle.net/2122/421
Authors: | La Rocca, M.* Saccorotti, G.* Del Pezzo, E.* Ibanez, J.* |
Title: | Probabilistic source location of explosion quakes at Stromboli volcano estimated with double array data | Journal: | Journal of volcanology and geothermal research | Series/Report no.: | 131 | Publisher: | Elsevier | Issue Date: | 2004 | DOI: | 10.1016/S0377-0273(03)00321-4 | URL: | www.elsevier.com/locate/jvolgeores | Keywords: | Stromboli Array Explosion quake Source location |
Subject Classification: | 04. Solid Earth::04.02. Exploration geophysics::04.02.06. Seismic methods 04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring |
Abstract: | Data from two dense arrays of short-period seismometers are used to retrieve source locations of the explosion quakes at Stromboli volcano. Slowness vectors stimated at both arrays with the zero-lag cross-correlation technique constitute the experimental data set. A probabilistic approach based on a grid search spanning the volcano interior is used to calculate the probability of the source location. Results depict a shallow source, located beneath the crater area, at depths not greater than 500 m below the surface. Results are slightly different from, but comparable to, those obtained in a companion experiment carried out in the same time period using a broad-band seismometer network, which show a source shifted some hundreds of meters northwest of the crater area. The method is revealed to be effective and useful for future studies having the purpose of real-time tracking of the explosion quakes and tremor. |
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