Graciosa volcan

stratovolcan 402 m

Condition actuelle: normal / en sommeil (1 sur 5)

The SE end of Graciosa, the northernmost of the central Azorean islands, contains a small 0.9 x 1.6 km caldera with active fumaroles.

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Style éruptif tipique: Explosive
Eruptions du volcan Graciosa: 2000-4000 years ago

HeureMag. / ProfondeurDistance/Lieu
jeudi, 14. octobre 2021 07:12 GMT (2 séismes)
14 oct. 2021 07:12 (GMT +0) (14. oct. 2021 07:12 GMT)
3.5

5 km		47 km (29 mi)
Océan Atlantique Nord, Portugal
14 oct. 2021 06:22 (GMT +0) (14. oct. 2021 06:22 GMT)
2.6
48 km (30 mi)
Océan Atlantique Nord, Portugal

Introduction

The 402-m-high SE caldera rim is the high point of the small 4 x 8 km island. The caldera has been the source of eruptions producing significant tephra falls, pyroclastic flows, lahars, and lava flows. An important fumarole field is located in a volcanic cave inside the caldera, and a submarine fumarole occurs off the NW coast of Graciosa. Scoria cones erupted along several widely spaced NE-SW-trending fissures fed a youthful lava field that forms the NW end of the island. The most recent eruption from Pico Tomao, NW of the caldera, produced a lava flow that reached the eastern coast NW of the village of Praia.
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Source: Smithsonian GVP


See also: Sentinel hub | Landsat 8
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