Seismic Q estimates in Umbria Marche (Central Italy): hints for the retrieval of a new attenuation law for seismic risk

In the Umbria–Marche (Central Italy) region an important earthquake sequence occurred in 1997, characterized by nine earthquakes with magnitudes in the range between 5 and 6, that caused important damages and causalities. In the present paper, we separately estimate intrinsic and scattering Q−1 parameters, using the classical multiple lapse time window analysis (MLTWA) approach in the assumption of a half-space model. The results clearly show...