2015
DOI: 10.1144/m44.17
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Chapter 17 Seismic activity on São Miguel Island volcano-tectonic structures (Azores archipelago)

Abstract: São Miguel, the largest island of the Azores, corresponds to one of the most seismically active areas within the archipelago. During historical times it was affected at least six times by destructive earthquakes, which were responsible for thousands of deaths. Several seismic crises are related both to volcanic eruptions and unrest episodes, being the cause of significant damage over more restricted areas. The central region of the island has been the most active in recent years and is characterized by the occ… Show more

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Cited by 17 publications
(12 citation statements)
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“…As can be seen in Figure 4.5, the central area of São Miguel, including Fogo Volcano and the Congro Fissural Volcanic System, corresponds to a zone of almost permanent activity (Silva et al 2015). It was located NE of Formigas Islets and was felt on both Santa Maria and São Miguel.…”
Section: Instrumental Seismicitymentioning
confidence: 97%
“…As can be seen in Figure 4.5, the central area of São Miguel, including Fogo Volcano and the Congro Fissural Volcanic System, corresponds to a zone of almost permanent activity (Silva et al 2015). It was located NE of Formigas Islets and was felt on both Santa Maria and São Miguel.…”
Section: Instrumental Seismicitymentioning
confidence: 97%
“…People and properties are, for instance, vulnerable to both earthquakes and landslides. Even though seismic activity in the area has been relatively low when compared with the other two active central volcanoes of the island, there are important seismogenic zones close to Sete Cidades that have generated strong earthquakes with damaging effects on the region (Gaspar et al 2015b;Silva et al 2015). The superficial deposits that cover most of the landscape in the region are made from unconsolidated pyroclasts, which are susceptible to landslides in particular on the caldera walls, the sea cliffs, steep slopes and deep valleys and the fault scarps of the Mosteiros Graben (Marques et al 2015).…”
Section: Final Remarksmentioning
confidence: 99%
“…São Miguel is the largest island in the archipelago and hosts the greatest population. Since settlement it has been affected by several earthquakes and seismic swarms of tectonic and/or volcanic nature, with epicentres located both offshore and inland (Silva et al 2015).…”
Section: Geological Setting Of Azores Archipelagomentioning
confidence: 99%