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| 2017 Ischia earthquake | |
|---|---|
| Name | 2017 Ischia earthquake |
| Magnitude | 3.9 M_w |
| Depth | 2 km |
| Date | 2017-08-21 |
| Local time | 20:57 CEST |
| Location | Ischia, Campania, Italy |
| Epicenter | northwest of Casamicciola Terme |
| Casualties | 2 dead, ~42 injured |
| Affected | Ischia, Province of Naples, Campania, Italy |
2017 Ischia earthquake The 2017 Ischia earthquake struck the island of Ischia in the Gulf of Naples on 21 August 2017, producing a shallow event that caused fatalities, injuries, and widespread damage to historic structures in Casamicciola Terme and other communities. The shock occurred in the broader tectonic region influenced by the Apennine Mountains, the Tyrrhenian Sea extensional regime, and the complex interaction of the African Plate and the Eurasian Plate. The event prompted national attention from institutions including the Protezione Civile, the Istituto Nazionale di Geofisica e Vulcanologia, and political figures in Rome and Naples.
Ischia lies in the volcanic and seismic province of the southern Italian Peninsula, near active volcanic centers such as Mount Epomeo and the island of Vulcano. The tectonics of the area are controlled by the rollback of the Adriatic Plate and extensional processes associated with the back-arc opening of the Tyrrhenian Sea, producing normal faulting and crustal thinning beneath parts of Campania. Historical events in the region include the 1883 Casamicciola earthquake and seismicity related to the Campanian volcanic arc, with instrumental monitoring by the Istituto Nazionale di Geofisica e Vulcanologia and seismic catalogs maintained by the European-Mediterranean Seismological Centre and the United States Geological Survey.
The mainshock, recorded at 20:57 CEST, was assessed by the Istituto Nazionale di Geofisica e Vulcanologia as magnitude 3.9 M_w with hypocentral depths estimated around 1–2 km beneath the island, consistent with a shallow normal-faulting mechanism inferred from waveform inversions and focal mechanisms produced by agencies such as the European-Mediterranean Seismological Centre and the United States Geological Survey. The sequence included numerous aftershocks cataloged by the INGV and the EMSC, and was compared in scientific discussion to earlier events affecting Ischia, including seismic swarms observed by INGV and historical shocks recorded in 1828 and 1883. Geodetic data from GNSS networks and campaign surveys provided constraints on coseismic deformation and informed studies by Italian universities such as the University of Naples Federico II and research institutes including the CNR.
The earthquake caused the collapse of parts of historic masonry buildings in Casamicciola Terme, damage to churches and heritage structures in Forio and Lacco Ameno, and disruption to tourism and local services on the island. Two fatalities were reported: one person in an apartment building and another in a separate collapse, with around 42 people injured and hundreds displaced. Damaged cultural assets included sections of churches and historic hotels frequented by visitors to Ischia Thermal Baths and facilities associated with the local hospitality sector. Assessments of structural vulnerability referenced Italian seismic codes such as those overseen by the Protezione Civile and research into seismic risk by the INGV and academic partners.
Immediate response involved the Protezione Civile, local emergency medical services coordinated with the Azienda Sanitaria Locale Napoli 2 Nord, volunteer organizations including the Italian Red Cross, and municipal authorities from Ischia municipality and the Metropolitan City of Naples. Search-and-rescue teams, structural engineers from the Order of Engineers of Naples and civil protection technicians performed building inspections, while temporary shelters and assistance were provided in coordination with national ministries based in Rome and regional authorities of Campania. The event mobilized media outlets such as RAI and international agencies including the European Union Civil Protection Mechanism for situational awareness and humanitarian coordination.
Recovery efforts involved emergency funding measures authorized by the Italian government and regional decrees from the Campania Region, with technical directives from the Protezione Civile and structural surveys by teams affiliated with the University of Naples Federico II and the CNR. Temporary housing and repair grants were managed alongside heritage conservation projects engaging the Ministry of Cultural Heritage for restoration of damaged churches and historic buildings. Reconstruction planning raised debates involving civic groups, local administrations in Casamicciola Terme and Lacco Ameno, and property owners, while insurance and compensation issues engaged national insurers and legal practitioners.
Following the disaster, judicial inquiries were opened by prosecutors in the Procura della Repubblica di Napoli to investigate building collapses, alleged violations of construction regulations, and potential criminal liability for manslaughter and culpable injury, invoking Italian criminal statutes adjudicated by courts in Naples. Engineers, architects, and municipal officials were scrutinized in relation to building permits, maintenance records, and adherence to seismic mitigation standards under national legislation such as the seismic classification frameworks implemented by the Ministry of Infrastructure and Transport (Italy). The investigations prompted broader policy discussions in the Italian Parliament and reform proposals by professional bodies including the National Council of Architects, Planners, Landscapers and Conservationists (CNAPPC) and the Italian Association of Civil Engineers.
Category:Earthquakes in Italy Category:2017 earthquakes Category:History of Campania