Lewati ke konten utama
← Kembali ke peta
⇄ Bandingkan

Danau Towada

Towada

Kaldera · Japan · 1011 m

The 11-km-wide lake-filled Towada caldera, whose far northern wall is seen here in the distance, formed during a series of major explosive eruptions over a 40,000-year period ending about 13,000 years ago. The peninsula across the center is the rim of Nakanoumi caldera that formed by the collapse of the Goshikiiwa cone. The Ogurayama dome to the upper right was the source of the 915 CE eruption.
The 11-km-wide lake-filled Towada caldera, whose far northern wall is seen here in the distance, formed during a series of major explosive eruptions over a 40,000-year period ending about 13,000 years ago. The peninsula across the center is the rim of Nakanoumi caldera that formed by the collapse of the Goshikiiwa cone. The Ogurayama dome to the upper right was the source of the 915 CE eruption. · Foto: Photo by Yukio Hayakawa (Gunma University). · Wikimedia Commons
Tipe
Kaldera
Negara
Japan
Wilayah
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Ketinggian
1011 m
Koordinat
40.510, 140.880
Letusan terakhir
915
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Caldera
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

The lake-filled, 11-km-wide, Towada caldera in northern Honshu formed during as many as six major explosive eruptions over a 40,000-year period ending about 13,000 years ago. Pre-caldera eruptive activity dates back about 2 million years and produced basaltic-to-dacitic lava cones. Following late-Pleistocene andesitic-to-rhyolitic caldera-forming eruptions, the basaltic Ninokura stratovolcano grew in the SSE section of the caldera. Successive dacitic-to-rhyolitic explosive eruptions from the Goshikiiwa cone led to the formation of the roughly 2-km-wide Nakanoumi caldera, whose SW and NE rims form peninsulas extending into Lake Towada. The andesitic-to-dacitic Ogurayama lava dome was built over the NE rim of Nakanoumi. The latest eruption took place in 915 CE, when eruptions from Ogurayama produced widespread ashfall and pyroclastic flows.

Ringkasan Wikipedia

Danau Towada merupakan danau kawah terbesar di pulau Honshu, Jepang. Terletak di perbatasan antara wilayah Aomori dan Akita, danau ini berada pada ketinggian 400 meter (1,800 ft) di atas permukaan laut dengan kedalaman 327 m (1,073 ft), dan dialiri oleh sungai Oirase. Dengan luas permukaan 61,1 km², Towada merupakan danau terbesar ke-12 di Jepang, dan warnanya yang biru cerah adalah karena kedalamannya. Danau ini agak bundar, dengan dua semenanjung yang memanjang dari pantai selatan sekitar sepertiga ke tengah danau.

Wikipedia · CC BY-SA · Baca artikel lengkap →

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
9490 BCE~9143 BCE · 1 letusan · VEI maks. 38449 BCE~8103 BCE · 1 letusan · VEI maks. 57409 BCE~7062 BCE · 1 letusan · VEI maks. 56368 BCE~6022 BCE · 1 letusan · VEI maks. 45675 BCE~5328 BCE · 1 letusan · VEI maks. 34287 BCE~3941 BCE · 1 letusan · VEI maks. 5819 BCE~472 BCE · 1 letusan · VEI maks. 4568~915 · 1 letusan · VEI maks. 59490 BCE7062 BCE4287 BCE1860 BCE568

Garis waktu rinci

  1. 915VEI 5Teramati
    915-08-17 – Berlangsung
    Goshikiiwa (NE rim Nakanoumi crater)
  2. 750 SMVEI 4Perkiraan geologi
    BCE 750 – Berlangsung
    Nakanoumi
  3. 4150 SMVEI 5Perkiraan geologi
    BCE 4150 – Berlangsung
    Goshikiiwa (Nakanoumi)
  4. 5550 SMVEI 3Perkiraan geologi
    BCE 5550 – Berlangsung
    Goshikiiwa
  5. 6250 SMVEI 4Perkiraan geologi
    BCE 6250 – Berlangsung
    Goshikiiwa
  6. 7250 SMVEI 5Perkiraan geologi
    BCE 7250 – Berlangsung
    Goshikiiwa
  7. 8250 SMVEI 5Perkiraan geologi
    BCE 8250 – Berlangsung
    Goshikiiwa
  8. 9490 SMVEI 3Perkiraan geologi
    BCE 9490 – Berlangsung
    Nakanoumi

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.