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漢拏山

Halla

楯状火山 · South Korea · 1919m

The massive Halla shield volcano, seen here from the south, forms much of the 40 x 80 km Cheju Island, which lies 90 km S of the Korean Peninsula. More than 360 late-Pleistocene and Holocene basaltic cones on the flanks of the low-angle volcano were erupted primarily along the long axis of the NE-SW-trending island. Most of these are scoria cones, but about 10 along the coast are Pleistocene tuff rings and tuff cones. Flank eruptions continued into historical time, with the final two taking place during the 11th century.
The massive Halla shield volcano, seen here from the south, forms much of the 40 x 80 km Cheju Island, which lies 90 km S of the Korean Peninsula. More than 360 late-Pleistocene and Holocene basaltic cones on the flanks of the low-angle volcano were erupted primarily along the long axis of the NE-SW-trending island. Most of these are scoria cones, but about 10 along the coast are Pleistocene tuff rings and tuff cones. Flank eruptions continued into historical time, with the final two taking place during the 11th century. · 写真: Photo by Norm Banks, 1980 (U.S. Geological Survey). · Wikimedia Commons
タイプ
楯状火山
国
South Korea
地域
Eastern Asia Volcanic Regions / Central East Asia Volcanic Province
標高
1919m
座標
33.361, 126.530
最終噴火
1007年
テクトニクス環境
Intraplate / Continental crust (> 25 km)
火山地形
Shield
主要岩石
Basalt / Picro-Basalt
地質学的概要

The massive Halla shield volcano forms much of the 40 x 80 km Cheju (Jeju) Island, which lies 90 km S of the Korean Peninsula. Eruptions during the Pliocene and Pleistocene built a lava plateau above the roughly 100-m-deep continental shelf on which the basaltic-to-trachytic edifice was constructed. A 400-m-wide crater truncates the summit. About 360 late-Pleistocene and Holocene basaltic cones across the flanks were erupted primarily along the long axis of the ENE-WSW-trending island. Most of these are scoria cones, but about 20 along the coast or offshore are Pleistocene-to-Holocene tuff rings and tuff cones; lava domes also occur. The latest two eruptions took place during the 11th century.

Wikipedia の要約

英語版の要約

Hallasan (Korean: 한라산) is a shield volcano comprising much of Jeju Island in South Korea. Its summit, at 1,947 m (6,388 ft), is the highest point in the country. The area around the mountain is a designated national park, named Hallasan National Park. Hallasan is commonly considered to be one of the three main mountains of South Korea, along with Jirisan and Seoraksan.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
2830 BCE~2638 BCE · 1件 · 最大 VEI ?2063 BCE~1871 BCE · 1件 · 最大 VEI ?815~1007 · 2件 · 最大 VEI ?2830 BCE1871 BCE911 BCE144 BCE815

詳細タイムライン

  1. 1007年VEI ?観測記録
    1007 ~ 進行中
  2. 1002年VEI ?観測記録
    1002 ~ 進行中
  3. 紀元前 2050年 (±200年)VEI ?地質学的推定
    BCE 2050 ~ 進行中
    SW flank (Songaksan tuff ring)
  4. 紀元前 2830年 (±50年)VEI ?地質学的推定
    BCE 2830 ~ 進行中
    NE flank (Ilchulbong tuff cone)

外部リンク

⚠ 参考情報です。緊急対応には使用しないでください。