エチオピア · 楯状火山
Dofan
Dofen
- タイプ
- 楯状火山
- 標高
- 1151m
- 最終噴火
- 不明
- タイプ
- 楯状火山
- 国
- エチオピア
- 地域
- 東アフリカ / Main Ethiopian Rift Volcanic Province
- 標高
- 1151m
- 座標
- 9.350, 40.130
- 最終噴火
- 不明
- テクトニクス環境
- リフト帯 / 大陸地殻 (> 25 km)
- 火山地形
- 楯状火山
- 主要岩石
- 流紋岩
地質学的概要
The Dofen shield volcano rises 450 m above the Awash plain in the northern Main Ethiopian Rift. Numerous cinder cones, constructed along a 10-km-long, N-S-trending line, occur on the flanks of the dominantly rhyolitic volcano. The northern cones are younger, have well-preserved morphologies, and display strong fumarolic activity. A major fumarole in a wide S-flank crater has precipitated large amounts of sulfur. The latest eruptions occurred during the Holocene (WoldeGabriel 1987, pers. comm.), and it is known as the "smoking mountain".
Wikipedia の要約
英語版の要約Dofan or Dofen is a 1,151 m (3,776 ft) high rhyolitic shield volcano in Ethiopia's Awash National Park. The volcano rises 450 m (1,480 ft) above the valley floor. A north–south zone of cinder cones extending 10 km (6.2 mi); the cones in the north show intense fumarolic activity. Along the southern flank crater, a fumarole produced significant sulfur. The volcano's last eruptions were during the Holocene. On 2 January 2025, smoke emitted from the volcano, prompting tens of thousands of residents living in the area to evacuate. The Ethiopian Geological Institute reported steam and debris expelled from the volcano. However, the Ethiopian Disaster Risk Management Commission did not confirm the eruption. The activity comes amid an earthquake swarm that lasted several weeks.
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