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Isla San Luis volcano

cono de Toba 180? m / 591 ft
Baja California, Mexico, 29.97°N / -114.4°W
Current status: normal or dormant (1 out of 5) | Reports
Isla San Luis volcano books
Typical eruption style: explosive
Erupciones del volcán Isla San Luis: unknown, possibly less than 100 years ago
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Mon, 25 Feb 2019
Mon, 25 Feb 18:27 UTCM 4.4 / 14 km26 kmGULF OF CALIFORNIA (Mexico)
Isla San Luis volcano forms the largest of the 7 Encantada islands in the northern part of the Gulf of California, about 3 km offshore. It is 4.5 sq km large and consists of a 180 m high cone with a narrow peninsula on the SW end.
It is not known when the volcano last erupted, but it could have been less than 100 years ago.

Background:

The volcano is located at the NW end of the Guaymas lineament. Initial basaltic-andesite and andesitic submarine surtseyan eruptions produced palagonite tuffs and were followed by the effusion of subaerial dacitic lava flows and the formation of dacitic tuff rings.
The latest eruptions formed 2 rhyolitic obsidian domes, the younger inside a tuff cone at the center of the island and at the older located at the NW tip of the island.


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