An active seismic experiment will be carried out on Sicily and Aeolian islands to study the internal structure of Etna Volcano. The main objective of the experiment is to perform a high resolution seismic tomography, in velocity and attenuation, in the Etnean region, by using active and passive seismic data, in an area encompassing outstanding volcanoes as Mt. Etna and Aeolian volcanoes. This experiment will start on July 20th, 2014 and the final phase will be performed in January-February 2015. The achievement of this objective is based on the integration and sharing of the in-situ marine and land experiments and observations and on the implementation of new instruments and monitoring systems. For the purpose, onshore and offshore seismic stations and passive and active seismic data generated both in marine and terrestrial environment will be used. Additionally, other geophysical data, mainly magnetic and gravimetric data will be considered to obtain a joint Upper Mantle-Crust structure that could permit to make progress in the understanding of the dynamic of the region.
This multinational experiment involves institutions from several countries as Italy, Spain, Germany, United Kingdom, Ireland, Mexico, Russia and USA among others with more than 65 researchers working simultaneously in onshore and onboard. This experiment is a collaborative effort of different research projects and relationships among institutions under a common joint project, MED-SUV. In this way, the portable seismic network is provided by the GFZ (Potsdam) under the support of a German project. The use of the scientific vessels is provided by the support of the EU project Eurofleet, the Spanish Government and by the collaboration of the Italian Navy. Three oceanographic vessels will be used. The Spanish vessel “Sarmiento de Gamboa CSIC-UTM” will be the responsible of the OBSs deployment and recovery and the generation of the seismic signals using air-gun shots for the Refraction and Reflexion seismic data. The “Galatea” vessel (Marina Militare Italina) will deploy additional OBSs and will be responsible of geophysical measurements in the area. Finally, the AEGAEO vessel, HCRM, Greece, will recovery in January-February 2015 some of the OBSs and will continue with the marine geophysical measurements.
Combining refraction and reflexion experiment, around 50.000 shots will be performed and recorded on a dense local seismic monitoring network consisting of 100 protable seismic stations, 70 permanent seismic stations from INGV, 25 OBSs stations and by a streamer 3 km long with 240 geophones associated to the “Sarmiento de Gamboa” vessel. In total we expect to record more than ten million of P-waves onsets, probably never done before in the world. In the follow figure we show the position of the seismic stations onshore and the OBSs.
Contact : Jesús M. Ibáñez. Andalusian Institute of Geophysics. University of Granada. (jibanez[at]ugr.es)
Follow the experiment here