Impact assessment caused by bradyseism phenomena in the Campi Flegrei area

Campi Flegrei (Italy) is among the areas with greatest volcanic explosive risk in world due to dangerousness of expected hazards, high exposed value (about 500,000 people will be evacuated during “alarm phase”), and vulnerability urban settlements under effect phenomena. The last two dramatic bradyseism phases occurred 1969–1972 1982–1984 when Pozzuoli town was affected by rapid ground inflation, which brought an overall higher level about 3.5 m caused numerous earthquakes (M ≤ 4.2), severe damage buildings. During 1984, seismicity intense, 33 events 0.5 < M 3 six 3.8. Subsequently, caldera characterized general subsidence for 20 years until 2005, a new inflation period started still ongoing (∼1 m). areal distribution recent uplift maximum vertical displacement Pozzuoli, radial decrease from center outwards. need better understand activity fundamental protecting population hazards linked eruptions understanding role as possible precursor potential eruption. In this perspective, part activities PLINIVS Study Centre (Centre Competence Italian Civil Protection Department Volcanic Risk), authors developed procedure, implemented web application, that relates monitoring deformation behavior buildings evaluate progressive ordinary Phlegraean near real time. This study describes models adopted three impact/risk factors (hazard, exposure, vulnerability) used estimate building damage.