Alamagan
Estratovolcán · United States · 744 m
- Tipo
- Estratovolcán
- País
- United States
- Región
- Northwestern Pacific Volcanic Regions / Mariana Volcanic Arc
- Altitud
- 744 m
- Coordenadas
- 17.600, 145.830
- Última erupción
- 870
- Contexto tectónico
- Subduction zone / Crustal thickness unknown
- Forma volcánica
- Composite
- Roca principal
- Andesite / Basaltic Andesite
Resumen geológico
Alamagan is the emergent summit of a large stratovolcano in the central Mariana Islands with a roughly 350-m-deep summit crater east of the center of the island. The exposed cone is largely Holocene in age. A 1.6 x 1 km graben cuts the SW flank. An extensive basaltic andesite lava flow has extended the northern coast of the island, and a lava platform also occurs on the S flank. Pyroclastic-flow deposits erupted about 1000 years ago have been dated, but reports of historical eruptions were considered invalid (Moore and Trusdell, 1993).
Resumen de Wikipedia
Resumen en inglésAlamagan is an island in the Northern Mariana Islands in the Pacific Ocean, 30 kilometres (16 nmi) north of Guguan, 250 kilometres (135 nmi) north of Saipan, and 60 kilometres (32 nmi) south of Pagan. It is currently undergoing resettlement since 2018, with a few people living there. The project was coordinated by the Northern Islands Mayor's office and the people there have radio contact with the mainland.
Wikipedia · CC BY-SA · Leer artículo completo →
Historial de erupciones
Línea de tiempo detallada
- 1887VEI ?Estimación geológica1887-11-29 – En curso
- 1864VEI ?Estimación geológica1864-01 – En curso
- 870 (±100 años)VEI 4Estimación geológica870 – En curso
- 540 (±75 años)VEI ?Estimación geológica540 – En curso
Enlaces externos
⚠ Solo como referencia. No apto para respuesta ante emergencias.