Megata

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Megata Vulkan

maars 291 m / 955 ft
Honshu, Japan, 39.95°N / 139.73°E
Aktueller Status: nicht aktiv (1 von 5)

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Typische Aktivität: Explosiv
Ausbrüche des Megata: around 2050 BC, 7050 BC
Letzte Erdbeben in der Nähe:

Zeit	Mag. / Tiefe	Distance	Ort
Sun, 19 May
Sun, 19 May 15:18 UTC	M 0.9 / 15 km	29 km	秋田県沖 (Akita Pref.)
Sat, 18 May
Sat, 18 May 18:34 UTC	M 1.7 / 22 km	31 km	秋田県沖 (Akita Pref.)
Sat, 11 May
Sat, 11 May 10:01 UTC	M 1.1 / 9 km	4 km	秋田県沿岸北部 (Akita Prefecture)
Sun, 5 May
Sun, 5 May 17:04 UTC	M 1.6 / 147 km	35 km	秋田県沖 (Akita Pref.)
Fri, 26 Apr
Fri, 26 Apr 19:29 UTC	M 1.8 / 143 km	22 km	秋田県沿岸南部 (Coast Akita Pref.)

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Megata volcano is a group of 3 small explosion craters (maars) along the tip of the Oga Peninsula in NW Honshu. Recent studies have shown that they have been active during the past 10,000 years.

Beschreibung:

Ichinomegata, the easternmost, largest, and oldest of the three maars, is 600 m in diameter. Ninomegata and Sannomegata are located immediately east and south of Toga Bay (Togowan), which itself is a maar. The rim of the rhyolitic Toga (Togowan) maar, larger than the Megata maars, is breached by the sea on the western side and was formed about 450,000 years ago. The Megata maars are mostly late Pleistocene in age, but Murayama (1987) noted that pottery from roughly 4000 years before present has been found within tephra layers from the maars.

- Smithsonian GVP volcano information
- Murayama I, (1987) "Volcanoes of Japan (I)", Tokyo: Daimedo, 315 p (2nd edition, in Japanese)
- Katsui et al (1979) "GENESIS OF CALC-ALKALIC ANDESITES FROM OSHIMA-OSHIMA AND ICHINOMEGATA VOLCANOES, NORTH JAPAN", J. Fac.Sci., Hokkaido Univ., Series IV, v. 19 (1-2), pp. 157-168

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