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In this work, we present regional maps of the inverse intrinsic quality factor (Qi−1), theinverse scattering quality factor (Qs−1) and total inverse quality factor (Qt−1) for the volcanicenvironment of Deception Island (Antarctica). Our attenuation study is based on diffusionapproximation, which permits us to obtain the attenuation coefficients for every single couplesource-receiver separately. The data set used in this research is derived from an active seismicexperiment using more than 5200 offshore shots (air guns) recorded at 32 onshore seismicstations and four ocean bottom seismometers. To arrive at a regional distribution of thesevalues, we used a new mapping technique based on a Gaussian space probability function.This approach led us to create ‘2-D probabilistic maps’ of values of intrinsic and scatteringseismic attenuation. The 2-D tomographic images confirm the existence of a high attenuationbody below an inner bay of Deception Island. This structure, previously observed in 2-Dand 3-D velocity tomography of the region, is associated with a massive magma reservoir.Magnetotelluric studies reach a similar interpretation of this strong anomaly. Additionally,we observed areas with lower attenuation effects that bear correlation with consolidatedstructures described in other studies and associated with the crystalline basement of thearea. Our calculations of the transport mean-free path and absorption length for intrinsicattenuation gave respective values of ≈950 m and 5 km, which are lower than the valuesobtained in tectonic regions or volcanic areas such as Tenerife Island. However, as observed inother volcanic regions, our results indicate that scattering effects dominate strongly over theintrinsic attenuation

Spatial distribution of intrinsic and scattering seismic attenuation in active volcanic islands – II: Deception Island images