Giappone · Caldera
Myōjin-shō
Myojinsho
- Tipo
- Caldera
- Altitudine
- 11 m
- Ultima eruzione
- 1970
- Tipo
- Caldera
- Paese
- Giappone
- Regione
- Pacifico nord-occidentale / Izu Volcanic Arc
- Altitudine
- 11 m
- Coordinate
- 31.888, 139.918
- Ultima eruzione
- 1970
- Contesto tettonico
- Zona di subduzione / Crosta oceanica (< 15 km)
- Forma vulcanica
- Caldera
- Roccia principale
- Dacite
Sintesi geologica
Beyonesu Rocks are part of the barely exposed rim of the largely submarine Myojinsho caldera. Formation of the 8-9 km wide caldera was followed by construction of a large (2.6 km3) lava dome and/or lava flow complex on the caldera floor, originally located at a depth of 1,000-1,100 m. Most eruptions recorded since the late-19th century have occurred from the dacitic post-caldera Myojinsho lava dome on the NE caldera rim. Deposits from submarine pyroclastic flows associated with growth of the dome cover it and extend both into the NE part of the caldera and down its outer slopes. An explosive submarine eruption from Myojinsho in 1952 destroyed a Japanese research vessel, killing all 31 on board. Submarine eruptions have also been observed from other points on the caldera rim and outside of the caldera. The Beyonesu Rocks were named after the French warship the Bayonnaise, which was surveying volcanic islands south of Tokyo Bay in 1850.
Sintesi da Wikipedia
Riassunto in ingleseMyōjin-shō (明神礁) is a submarine volcano located about 450 kilometers south of Tokyo on the Izu-Ogasawara Ridge in the Izu Islands. Volcanic activity has been detected there since 1869. Since then it has undergone more eruptions, the most powerful of which resulted in the appearance and disappearance of a small island.
Wikipedia · CC BY-SA · Leggi l'articolo completo →
Storia delle eruzioni
25 registrateGlossarioCronologia dettagliata
- 2023VEI ?Osservata2023-01-26 – 2023-01-26
- 2018VEI ?Osservata2018-03-24 – 2018-03-24
- 1988VEI 0Metodo non indicato1988-03-18 – 1988-03-19Myojinsho
- 1987VEI 0Metodo non indicato1987-10-21 – 1987-12-09Myojinsho
- 1986VEI 0Metodo non indicato1986-10-24 – 1986-10-24Myojinsho
- 1983VEI 0Metodo non indicato1983-05-12 – fine sconosciutaMyojinsho
- 1982VEI 0Metodo non indicato1982-08-10 – fine sconosciutaMyojinsho
- 1980VEI 0Metodo non indicato1980-11-15 – 1980-12-23Myojinsho
- 1979VEI 0Metodo non indicato1979-07-13 – fine sconosciutaMyojinsho
- 1971VEI 0Metodo non indicato1971-03-18 – fine sconosciuta
- 1970VEI 2Osservata1970-01-29 – 1970-06-16Myojinsho
- 1960VEI 2Osservata1960-07-21 – fine sconosciutaMyojinsho
- 1959VEI 0Osservata1959-07-02 – fine sconosciuta
- 1958VEI 0Osservata1958-07-02 – fine sconosciuta
- 1957VEI 0Osservata1957-05-02 – fine sconosciuta
- 1955VEI 0Osservata1955-06-25 – fine sconosciuta4 km north of Bayonnaise Rocks
- 1954VEI 0Osservata1954-11-04 – 1954-11-05Myojinsho
- 1952VEI 2Osservata1952-09-16 – 1953-10-16Myojinsho
- 1946VEI 2Osservata1946-02-04 – fine sconosciutaIsland at 31.95 N 140.02 E
- 1934VEI 0Osservata1934-05-16 – fine sconosciuta9 km E of Bayonnaise Rocks
- 1915VEI 0Osservata1915-02-16 – 1915-07-1611 km east, 19 km NE, 4 km SW
- 1906VEI 1Osservata1906-04-07 – 1906-04-149-15 km SE of Bayonnaise Rocks
- 1896VEI 2Osservata1896-07-02 – fine sconosciuta14 km north of Bayonnaise Rocks
- 1871VEI 0Metodo non indicato1871-07-02 – fine sconosciutaVolcano Uncertain
- 1869VEI 0Metodo non indicato1869-05-06 – fine sconosciutaVolcano Uncertain
Vulcani nelle vicinanze
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.