Jepang · Kaldera
Myōjin-shō
Myojinsho
- Tipe
- Kaldera
- Ketinggian
- 11 m
- Letusan terakhir
- 1970
- Tipe
- Kaldera
- Negara
- Jepang
- Wilayah
- Pasifik Barat Laut / Izu Volcanic Arc
- Ketinggian
- 11 m
- Koordinat
- 31.888, 139.918
- Letusan terakhir
- 1970
- Kondisi tektonik
- Zona subduksi / Kerak samudra (< 15 km)
- Bentuk lahan
- Kaldera
- Batuan utama
- Dasit
Ringkasan geologi
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.
Ringkasan Wikipedia
Ringkasan InggrisMyōjin-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.
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Riwayat letusan
25 tercatatGlosariumGaris waktu rinci
- 2023VEI ?Teramati2023-01-26 – 2023-01-26
- 2018VEI ?Teramati2018-03-24 – 2018-03-24
- 1988VEI 0Metode tidak dinyatakan1988-03-18 – 1988-03-19Myojinsho
- 1987VEI 0Metode tidak dinyatakan1987-10-21 – 1987-12-09Myojinsho
- 1986VEI 0Metode tidak dinyatakan1986-10-24 – 1986-10-24Myojinsho
- 1983VEI 0Metode tidak dinyatakan1983-05-12 – akhir tidak diketahuiMyojinsho
- 1982VEI 0Metode tidak dinyatakan1982-08-10 – akhir tidak diketahuiMyojinsho
- 1980VEI 0Metode tidak dinyatakan1980-11-15 – 1980-12-23Myojinsho
- 1979VEI 0Metode tidak dinyatakan1979-07-13 – akhir tidak diketahuiMyojinsho
- 1971VEI 0Metode tidak dinyatakan1971-03-18 – akhir tidak diketahui
- 1970VEI 2Teramati1970-01-29 – 1970-06-16Myojinsho
- 1960VEI 2Teramati1960-07-21 – akhir tidak diketahuiMyojinsho
- 1959VEI 0Teramati1959-07-02 – akhir tidak diketahui
- 1958VEI 0Teramati1958-07-02 – akhir tidak diketahui
- 1957VEI 0Teramati1957-05-02 – akhir tidak diketahui
- 1955VEI 0Teramati1955-06-25 – akhir tidak diketahui4 km north of Bayonnaise Rocks
- 1954VEI 0Teramati1954-11-04 – 1954-11-05Myojinsho
- 1952VEI 2Teramati1952-09-16 – 1953-10-16Myojinsho
- 1946VEI 2Teramati1946-02-04 – akhir tidak diketahuiIsland at 31.95 N 140.02 E
- 1934VEI 0Teramati1934-05-16 – akhir tidak diketahui9 km E of Bayonnaise Rocks
- 1915VEI 0Teramati1915-02-16 – 1915-07-1611 km east, 19 km NE, 4 km SW
- 1906VEI 1Teramati1906-04-07 – 1906-04-149-15 km SE of Bayonnaise Rocks
- 1896VEI 2Teramati1896-07-02 – akhir tidak diketahui14 km north of Bayonnaise Rocks
- 1871VEI 0Metode tidak dinyatakan1871-07-02 – akhir tidak diketahuiVolcano Uncertain
- 1869VEI 0Metode tidak dinyatakan1869-05-06 – akhir tidak diketahuiVolcano Uncertain
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