Jepang · Stratovolkan
Hachijō-jima
Hachijojima
- Tipe
- Stratovolkan
- Ketinggian
- 854 m
- Letusan terakhir
- 1606
- Tipe
- Stratovolkan
- Negara
- Jepang
- Wilayah
- Pasifik Barat Laut / Izu Volcanic Arc
- Ketinggian
- 854 m
- Koordinat
- 33.137, 139.766
- Letusan terakhir
- 1606
- Kondisi tektonik
- Zona subduksi / Kerak samudra (< 15 km)
- Bentuk lahan
- Komposit
- Batuan utama
- Basal / Pikrobasal
Ringkasan geologi
Hachijojima, in the central Izu Islands about 300 km S of Tokyo, consists of two small Quaternary dominantly basaltic stratovolcanoes forming an elongated NW-SE-trending island. The eroded Pleistocene-to-Holocene Higashiyama volcano occupies the SE end of the 14-km-long island. The symmetrical Holocene Nishiyama volcano the NW end has cones on the SE flank. The small volcanic island of Kojima lies several kilometers W of Hachijojima. Growth of Higashiyama began several tens of thousands of years ago, and included the formation of two small calderas. The initial submarine and early subaerial eruptions of Nishiyama took place from 10,000 to 8,000 years before present (BP). Its latest major activity, from the early Holocene until about 4,000 BP, was restricted to flank eruptions. Eruptions recorded since the 15th century have been restricted to the summit of Nishiyama and a submarine vent of unknown location.
Ringkasan Wikipedia
Ringkasan InggrisHachijō-jima is a volcanic island of Japan in the Pacific Ocean. It is about 287 km (178 mi) south of the special wards of Tokyo. It is part of the Izu archipelago and within the Fuji-Hakone-Izu National Park. Its only municipality is Hachijō. On 1 March 2018, its population was 7,522 people living on 63 km2. Some inhabitants speak Hachijō language, which is considered an endangered language and the number of speakers is unknown. The island has been inhabited since the Jōmon period, and was used as a place of exile during the Edo period. In modern times, it has been used for farming sugarcane and housing a secret submarine base during World War II; it is now a tourist destination within Japan.
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Riwayat letusan
19 tercatatGlosariumGaris waktu rinci
- 1707VEI 2Metode tidak dinyatakan1707 – akhir tidak diketahui
- 1606VEI 2Teramati1606-01-23 – akhir tidak diketahuiSubmarine flank
- 1605VEI 2Teramati1605-10-27 – akhir tidak diketahuiNishi-yama SE flank
- 1518VEI 2Teramati1518-02 – 1523Nishi-yama
- 1487VEI 2Teramati1487-12-07 – akhir tidak diketahuiNishi-yama
- 850 (±200 tahun)VEI ?Perkiraan geologi850 – akhir tidak diketahuiNishi-yama summit and SE flank
- 150 SM (±50 tahun)VEI ?Perkiraan geologi150 SM – akhir tidak diketahuiNishi-yama
- 350 SM (±500 tahun)VEI 3Perkiraan geologi350 SM – akhir tidak diketahuiNW flank of Higashi-yama
- 1150 SM (±700 tahun)VEI ?Perkiraan geologi1150 SM – akhir tidak diketahuiSE flank of Nishi-yama (Kanda-yama)
- 1250 SM (±800 tahun)VEI ?Perkiraan geologi1250 SM – akhir tidak diketahuiNishi-yama
- 2050 SMVEI 5Perkiraan geologi2050 SM – akhir tidak diketahuiSE of Nishi-yama, NE of Higashi-yama
- 2450 SM (±500 tahun)VEI 4Perkiraan geologi2450 SM – akhir tidak diketahuiNishi-yama
- 2550 SM (±500 tahun)VEI 3Perkiraan geologi2550 SM – akhir tidak diketahuiS flank of Higashi-yama (Myohoji)
- 2700 SM (±100 tahun)VEI 3Perkiraan geologi2700 SM – akhir tidak diketahuiBetween Nishi-yama & Higashi-yama
- 3350 SM (±1300 tahun)VEI ?Perkiraan geologi3350 SM – akhir tidak diketahuiNishi-yama
- 4650 SMVEI 5Perkiraan geologi4650 SM – akhir tidak diketahuiNishi-yama
- 5020 SM (±370 tahun)VEI 3Perkiraan geologi5020 SM – akhir tidak diketahuiHigashi-yama south flank
- 7650 SM (±3000 tahun)VEI ?Perkiraan geologi7650 SM – akhir tidak diketahuiNishi-yama
- 8020 SM (±2640 tahun)VEI 4Perkiraan geologi8020 SM – akhir tidak diketahuiNishi-yama
Gunung api terdekat
Tautan eksternal
⚠ Untuk referensi saja. Bukan untuk tanggap darurat.