San Venanzo Volcano

Updated: 17 mai 2024 01:19 GMT - refresh

Maar 466 m / 1529 ft
Italy, 42.85°N / 12.28°E
Condition actuelle: (probablement) éteint (0 sur 5)

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Style éruptif tipique: unspecified
Eruptions du volcan San Venanzo: None during the past 10,000 years
Less than 2.58 million years ago (Pleistocene)

Derniers séismes proches

Heure	Mag. / Profondeur	Distance / Lieu
15 mai 04:12 (Rome)	0.8 8 km	24 km à l'est	40 km au sud de Pérouse, Perugia, Umbria, Italie	Info
samedi, 4 mai 2024 GMT (1 séisme)
4 mai 08:30 (Rome)	1.4 6.9 km	14 km au sud-est	Italy: 2 km E Todi (PG)	Info

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Introduction

The San Venanzo complex consists of the San Venanzo maar and the Pian di Celle tuff ring, both part of the Umbria-Latium ultra-alkaline district. The tuff ring is also associated with two spatter cones and a scoria cone. This complex of vents lies within the Tiber Valley Graben, where magmatism is believed to be a result of extension that began during the Pliocene (Stoppa, 1996). Early on, the eruption was explosive, producing pyroclastic flows and dry lapilli surges covering an area of about 0.15 km2; later eruptive behavior was dominated by lava flows. Block collapse and debris flows led to the formation of the steep inner crater walls. The tuffs of both San Venanzo and Pian di Celle are calcitic to carbonatitic in composition, and have been dated at about 265 +/- 3 ka (Stoppa, 1996; Stoppa and Sforna, 1995).
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Smithsonian / GVP volcano information