Giappone · Vulcano complesso
Mount Iwate
Iwatesan
- Tipo
- Vulcano complesso
- Altitudine
- 2038 m
- Ultima eruzione
- 1919

- Tipo
- Vulcano complesso
- Paese
- Giappone
- Regione
- Pacifico nord-occidentale / Northeast Japan Volcanic Arc
- Altitudine
- 2038 m
- Coordinate
- 39.853, 141.001
- Ultima eruzione
- 1919
- Contesto tettonico
- Zona di subduzione / Crosta continentale (> 25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Basalto / Picrobasalto
Sintesi geologica
Viewed from the east, Iwatesan volcano has a symmetrical profile that invites comparison with Fuji, but on the west an older cone is visible containing an oval-shaped, 1.8 x 3 km caldera. After the growth of Nishi-Iwate volcano beginning about 700,000 years ago, activity migrated eastward to form Higashi-Iwate volcano. Iwate has collapsed seven times during the past 230,000 years, most recently between 739 and 1615 CE. The dominantly basaltic summit cone of Higashi-Iwate volcano, Yakushidake, is truncated by a 500-m-wide crater. It rises well above and buries the eastern rim of the caldera, which is breached by a narrow gorge on the NW. A central cone containing a 500-m-wide crater partially filled by a lake is located in the center of the oval-shaped caldera. A young lava flow from Yakushidake descended into the caldera, and a fresh-looking lava flow from the 1732 eruption traveled down the NE flank.
Sintesi da Wikipedia
Riassunto in ingleseMount Iwate is a stratovolcano complex in the Ōu Mountains of western Iwate Prefecture, in the Tōhoku region of northern Honshū, Japan. With an elevation of 2,038 metres (6,686 ft), it is the highest in Iwate Prefecture. It is included as one of the 100 famous mountains in Japan, a book composed in 1964 by mountaineer and author Kyūya Fukada. The mountain is on the borders of the municipalities of Hachimantai, Takizawa, and Shizukuishi, west of the prefectural capital of Morioka. Much of the mountain is within the borders of the Towada-Hachimantai National Park. The mountain is also referred to as the "Nanbu Fuji" for its resemblance to Mount Fuji.
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Storia delle eruzioni
29 registrateGlossarioCronologia dettagliata
- 1934VEI ?Metodo non indicato1934-07-16 – 1935-07-02
- 1919VEI 1Osservata1919-07-15 – 1919-07-15W side of Onigajo caldera (O-jigokudani)
- 1732VEI 2Osservata1732-01-22 – 1732-10NE flank of Yakushi-dake
- 1689VEI 2Metodo non indicato1689-06-22 – fine sconosciuta
- 1687VEI 2Metodo non indicato1687-04-14 – 1687-07
- 1686VEI 3Osservata1686-03-26 – 1686-03-27
- 1450 (±100 anni)VEI ?Stima geologica1450 – fine sconosciutaNishi-Iwate and Higashi-Iwate
- 1300 (±50 anni)VEI 3Stima geologica1300 – fine sconosciutaHigashi-Iwate (Myoko-dake)
- 150VEI ?Stima geologica150 – fine sconosciutaHigashi-Iwate
- 350 a.C.VEI ?Stima geologica350 a.C. – fine sconosciutaHigashi-Iwate
- 450 a.C.VEI ?Stima geologica450 a.C. – fine sconosciutaNishi-Iwate (O-jigokudani area)
- 1150 a.C.VEI ?Stima geologica1150 a.C. – fine sconosciutaNishi-Iwate
- 1250 a.C.VEI 3Stima geologica1250 a.C. – fine sconosciutaHigashi-Iwate
- 1500 a.C. (±300 anni)VEI ?Stima geologica1500 a.C. – fine sconosciutaHigashi-Iwate
- 1650 a.C.VEI ?Stima geologica1650 a.C. – fine sconosciutaNishi-Iwate (O-jigokudani area)
- 2000 a.C.VEI ?Stima geologica2000 a.C. – fine sconosciutaNishi-yama
- 2050 a.C. (±200 anni)VEI ?Stima geologica2050 a.C. – fine sconosciutaHigashi-Iwate
- 2700 a.C. (±200 anni)VEI ?Stima geologica2700 a.C. – fine sconosciutaHigashi-Iwate
- 2950 a.C. (±50 anni)VEI ?Stima geologica2950 a.C. – fine sconosciutaNishi-Iwate
- 3050 a.C.VEI ?Stima geologica3050 a.C. – fine sconosciutaHigashi-Iwate
- 3250 a.C. (±500 anni)VEI 0Stima geologica3250 a.C. – fine sconosciuta
- 3750 a.C. (±100 anni)VEI ?Stima geologica3750 a.C. – fine sconosciutaHigashi-Iwate
- 4350 a.C. (±500 anni)VEI ?Stima geologica4350 a.C. – fine sconosciutaHigashi-Iwate
- 4450 a.C. (±500 anni)VEI 0Stima geologica4450 a.C. – fine sconosciutaHigashi-Iwate
- 4850 a.C. (±50 anni)VEI ?Stima geologica4850 a.C. – fine sconosciutaNishi-Iwate
- 4900 a.C. (±100 anni)VEI ?Stima geologica4900 a.C. – fine sconosciutaHigashi-Iwate
- 5650 a.C. (±50 anni)VEI ?Stima geologica5650 a.C. – fine sconosciutaNishi-Iwate
- 6300 a.C. (±100 anni)VEI ?Stima geologica6300 a.C. – fine sconosciutaNishi-Iwate
- 6450 a.C. (±1600 anni)VEI ?Stima geologica6450 a.C. – fine sconosciuta
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