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Gunung Unzen

Unzendake

Gunung api kompleks · Japan · 1483 m

The Unzen volcanic complex comprises much of the Shimabara Peninsula east of Nagasaki, seen here looking to the W from across Shimabara Bay. Three large edifices are visible: Kinugasa to the N, Fugendake in the E-center, and Kusenbu on the S. Historical eruptive activity has occurred at the summit and flanks of Fugendake. Activity during 1990-95 formed a lava dome at the summit that produced pyroclastic flows (block-and-ash flows).
The Unzen volcanic complex comprises much of the Shimabara Peninsula east of Nagasaki, seen here looking to the W from across Shimabara Bay. Three large edifices are visible: Kinugasa to the N, Fugendake in the E-center, and Kusenbu on the S. Historical eruptive activity has occurred at the summit and flanks of Fugendake. Activity during 1990-95 formed a lava dome at the summit that produced pyroclastic flows (block-and-ash flows). · Foto: Photo by Tom Casadevall, 1991 (U.S. Geological Survey). · Wikimedia Commons
Tipe
Gunung api kompleks
Negara
Japan
Wilayah
Western Pacific Volcanic Regions / Nankai Volcanic Arc
Ketinggian
1483 m
Koordinat
32.761, 130.299
Letusan terakhir
1996
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

The massive Unzendake volcanic complex comprises much of the Shimabara Peninsula east of the city of Nagasaki. An E-W graben, 30-40 km long, extends across the peninsula. Three large stratovolcanoes with complex structures, Kinugasa on the north, Fugen-dake at the east-center, and Kusenbu on the south, form topographic highs on the broad peninsula. Fugendake and Mayuyama volcanoes in the east-central portion of the andesitic-to-dacitic volcanic complex have been active during the Holocene. The Mayuyama lava dome complex, located along the eastern coast west of Shimabara City, formed about 4000 years ago and was the source of a devastating 1792 CE debris avalanche and tsunami. Historical eruptive activity has been restricted to the summit and flanks of Fugendake. The latest activity during 1990-95 formed a lava dome at the summit, accompanied by pyroclastic flows that caused fatalities and damaged populated areas near Shimabara City.

Ringkasan Wikipedia

Ringkasan Inggris

Mount Unzen is an active stratovolcano of several overlapping small, volcanic cones, near the city of Shimabara, Nagasaki on the island of Kyushu, Japan's southernmost main island.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
4050 BCE~3848 BCE · 1 letusan · VEI maks. ?2841 BCE~2639 BCE · 2 letusan · VEI maks. ?2236 BCE~2035 BCE · 1 letusan · VEI maks. ?1632 BCE~1430 BCE · 1 letusan · VEI maks. ?1229 BCE~1027 BCE · 1 letusan · VEI maks. ?787~988 · 1 letusan · VEI maks. ?1593~1794 · 4 letusan · VEI maks. 21794~1996 · 3 letusan · VEI maks. 24050 BCE2639 BCE1027 BCE3841794

Garis waktu rinci

  1. 1996VEI 2Teramati
    1996-02-10 – 1996-05-01
    Fugen-dake
  2. 1990VEI 1Teramati
    1990-11-17 – 1995-02-16
    Fugen-dake
  3. 1798VEI ?Perkiraan geologi
    1798-11-13 – 1798-12
    Fugen-dake
  4. 1792VEI 2Teramati
    1792-02-10 – 1792-07-22
    Fugen-dake (summit, NNE), Mayu-yama
  5. 1690VEI ?Perkiraan geologi
    1690 – 1692
  6. 1663VEI 2Teramati
    1663-04 – 1663-05
    Fugen-dake (Tsukumo-jima Pond)
  7. 1663VEI 2Teramati
    1663-12-11 – 1663-12-27
    NE flank of Fugen-dake (1200 m)
  8. 860VEI ?Perkiraan geologi
    860 – Berlangsung
  9. 1150 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 1150 – Berlangsung
    Fugendake-Sancho
  10. 1450 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 1450 – Berlangsung
    Fugen-dake (Kazaana)
  11. 2150 SM (±800 tahun)VEI ?Perkiraan geologi
    BCE 2150 – Berlangsung
    Mayu-yama (Tengu-yama)
  12. 2640 SM (±500 tahun)VEI ?Perkiraan geologi
    BCE 2640 – Berlangsung
    Mayu-yama (Shichimen-zan)
  13. 2720 SM (±300 tahun)VEI ?Perkiraan geologi
    BCE 2720 – Berlangsung
    Fugen-dake
  14. 4050 SM (±3000 tahun)VEI ?Perkiraan geologi
    BCE 4050 – Berlangsung
    Fugen-dake (Shimanomine)

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.