The 2017, MD = 4.0, Casamicciola Earthquake: ESI-07 Scale Evaluation and Implications for the Source Model

On 21 August 2017 at 20:57 (local time) a very shallow (H = 1.2 km), moderate (Md 4.0), earthquake hit the volcanic island of Ischia (Southern Italy), causing death two people. The study damage to buildings with European Macroseismic Scale 98 (EMS-98), carried out immediately after earthquake, highlighted that hilly area Casamicciola Terme, on northern side Mt. Epomeo, was most damaged part locally quite relevant (I VIII EMS). This seismic event is first damaging in during instrumental era. In fact, this provides, for time, opportunity integrate historical seismicity, macroseismic observations, information, and detailed mapping geological coseismic effects. work we evaluate effects induced by environment using Environmental Seismic Intensity 2007 (ESI-07) scale. analysis, together superficial faulting characteristics available geophysical allows us reconsider source model previous earthquakes Terme area. application ESI scale assignment intensity offers better spatial resolution, as well an increase time window assessment hazard, allowing reduce implicit uncertainty attenuation laws peculiar volcano-tectonic setting. Since linked direct measure damage, it commonly used hazard assessment, argue building strongly influenced surface near field effects, therefore controlled geometry source.