Array analysis using circular-wave-front geometry:an application to locate the nearby seismo-volcanic source Almendros González, Francisco Javier Ibáñez Godoy, Jesús Miguel Alguacil De La Blanca, Ángel Gerardo Del Pezzo, Edoardo This paper has been partially supported by the project ANT95-0994-C03-02 and by the Grupo de Investigación en Geofísica de la J.A., 4057. We gratefully acknowledge the Spanish Army and Navy for providing us with logistical help during the Antarctic surveys in the Gabriel de Castilla Station. The zero-lag cross-correlation technique, used for array analysis in the hypothesis of plane waves, has been modified to allow the wave front to be circular. Synthetic tests have been performed to check the capability of the method, which returns the input test data when the source–array distances are not greater than two or three times the array aperture. For this distance range the method furnishes an estimate of the apparent velocity and the epicentral coordinates of the source. For more distant sources the method becomes equivalent to that based on the planar-wave approximation, which gives an estimate of the backazimuth to the source and the apparent velocity. The method has been applied to seismic data recorded at the active volcano located at Deception Island, Antarctica. 35 volcanic long-period events occurring in a small swarm were selected. Results show that the epicentres are close to the array (between 0.4 and 2 km) and aligned in a SW direction, in agreement with one of the main directions of the fracture system of Deception volcano. 2024-12-13T11:27:48Z 2024-12-13T11:27:48Z 1999 journal article Javier Almendros, Jesús M. Ibáñez, Gerardo Alguacil, Edoardo Del Pezzo, Array analysis using circular-wave-front geometry:an application to locate the nearby seismo-volcanic source, Geophysical Journal International, Volume 136, Issue 1, January 1999, Pages 159–170, https://doi.org/10.1046/j.1365-246X.1999.00699.x https://hdl.handle.net/10481/97994 10.1046/j.1365-246X.1999.00699.x eng http://creativecommons.org/licenses/by-nc-nd/3.0/ open access Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License Oxford University Press