Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2243
Authors: | Nisii, V.* Saccorotti, G.* |
Title: | Complex wave propagation in the Campi Flegrei Caldera, Italy,from Source and receiver-array analysis of sea-shot recordings | Journal: | Bollettino di Geofisica Teorica ed Applicata | Series/Report no.: | 1-2/47 (2006) | Publisher: | OGS | Issue Date: | 2006 | Keywords: | NONE | Subject Classification: | 05. General::05.01. Computational geophysics::05.01.01. Data processing | Abstract: | We investigate wave propagation in the complex shallow crust of Campi Flegrei Volcanic Complex, Italy, using array recordings of air-guns. We apply source- and receiver-array analysis to define the independent variation of horizontal slowness at both the source and receiver regions. This method allows the identification of asymmetric ray-paths associated with near-source and near-observer velocity heterogeneities. P-wave wave-vectors at both the source and receiver arrays depict discrepancies as large as 50° with respect to the values expected for the 3D velocity structure of the Gulf. At the source region, these discrepancies may be associated with either un-modelled complexities in the geometry of the buried caldera rim, or with velocity variations beneath the source-array. At the receiver array, the inferred anomalies may be attributed to velocity variations marking the Solfatara crater rim, or to a near-receiver, low-velocity body whose position would coincide with negative gravimetric anomalies and a low Vp/Vs ratio region inferred by independent geophysical and seismological studies. |
Appears in Collections: | Article published / in press |
Show full item record
Page view(s)
132
checked on Mar 27, 2024
Download(s) 50
363
checked on Mar 27, 2024