Mount Ōkueyama
Stratovolcano on the island of Kyushu, Japan
From Wikipedia, the free encyclopedia
Mount Ōkueyama (大崩山), also known as Mount Ōkue, is a volcanic mountain on the Japanese island of Kyushu. Part of an ancient volcanic formation known as the Okueyama Volcano-plutonic Complex,[1] Mount Ōkueyama (and possibly several nearby volcanoes)[2] experienced a massive eruption ~13.7 million years before present (13.7 Ma); it has been postulated that this eruption measured 8 on the Volcanic Explosivity Index, making the Ōkueyama eruption larger than any eruption in recorded history.[2] The volcano is now considered to be extinct.[1]
| Mount Ōkueyama | |
|---|---|
| |
| Highest point | |
| Elevation | 1,643 m (5,390 ft) |
| Coordinates | 32°44′16″N 131°30′47″E |
| Geography | |
 | |
| Location | Kyushu, Japan |
| Geology | |
| stratovolcano | |
| Last eruption | ~13.7 Ma |
In 1990, the area around the mountain was designated a Forest Ecosystem Reserve,[3] and In 2017 Mount Ōkueyama was declared part of a UNESCO biosphere reserve, the Sobo, Katamuki and Okue Biosphere Reserve.[4][5]
The area is managed by the Forestry Agency of Japan.[3]