three-dimensional coda wave attenuation tomography of a volcano: a case of 1982–84 seismic unrest at campi flegrei caldera, southern italy

Active volcanic settings are characterized by ground deformations and seismic unrests which could result in lowmagnitude seismicity or a major quake. campi flegrei caldera (southern italy) is a typical example of an active volcano affected by repeated deformation and seismic unrests, which have been monitored with an extensive monitoring network. the late-arriving waves recorded by seismograms, the seismic coda waves, are an invaluable tool to image volcanicstructures if combined with standard direct-wave images.