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E-san vulcano

stratovolcano / lava dome 618 m / 2,028 ft
Hokkaido, Giappone, 41.8°N / 141.17°E
Stato attuale: normal or dormant (1 di 5)

E-san (恵山(えさん) in Japanese) is the southernmost active volcano on Hokkaido. It is a small andesitic stratovolcano located in the southeast of the Kameda-hanto Peninsula extending into the Pacific Ocean from the south of Hokkaido across the Tsugaru Strait from Honshu.
It has a lava dome forming its summit and another lava dome to the NW. Both have been active within the past 10,000 years, the summit lava dome forming about 9000 years ago.
The only known historic eruptions were a small phreatic eruption in 1846 which produced a lahar with many fatalities, and a small explosion in 1874.
E-san has many active fumaroles in a thermal area on the upper NW flank.
Fumaroles are located on the upper NW flank. At the foot of Mt. E-san is the Esan-onsen Hot Spring, a popular attraction since the latter half of the 19th century, it is renowned for its distinctive wine-red colored water.

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Stile eruttivo tipico: esplosioni freatiche
Eruzioni del vulcano E-san: 1874, 1846, 3900 BC ± 100 years

Latest nearby earthquakes

Data / oraMag. / ProfonditàDistanzaUbicazione
Sun, 7 Mar 2021 (GMT) (1 terremoto)
7 mar 2021 23:21 (GMT +9) (7 Mar 2021 14:21:25 GMT)
4.1

52 km - Più
110 kmNorth Pacific Ocean, 25 km a sud da Shizunai-furukawachō, Giappone
Sat, 6 Mar 2021 (GMT) (1 terremoto)
6 mar 2021 15:27 (GMT +9) (6 Mar 2021 06:27:40 GMT)
3.1

12 km - Più
114 kmJapan Sea, 50 km a sud-est da Okushiri, Hokkaido, Giappone
Fri, 5 Mar 2021 (GMT) (1 terremoto)
5 mar 2021 15:14 (GMT +9) (5 Mar 2021 06:14:07 GMT)
4.6

72 km - Più
113 kmNorth Pacific Ocean, 33 km a sud da Shizunai-furukawachō, Giappone
Wed, 3 Mar 2021 (GMT) (1 terremoto)
3 mar 2021 17:08 (GMT +9) (3 Mar 2021 08:08:12 GMT)
3.0

32 km - Più
112 kmNorth Pacific Ocean, 40 km a sud da Shizunai-furukawachō, Giappone
Tue, 2 Mar 2021 (GMT) (1 terremoto)
3 mar 2021 03:33 (GMT +9) (2 Mar 2021 18:33:39 GMT)
2.7

116 km - Più
54 kmNorth Pacific Ocean, 26 km a nord est da Mutsu, Prefettura di Aomori, Giappone

Sfondo

E-san volcano Hot Springs
Hot springs are found in 2 areas separated by the River Yaziri. The most well-known and active area are the Mizunashi hot springs east of E-san volcano.
The following is summarized from John Seach, who quotes from an unknown source:
The Mizunashi hot springs are artesian springs of an aquifer in porous liparitic andesite. The Mizunashi hot springs can be divieded into a northern and southern part, the springs in the southern part being more active. Their maximum temperature reaches 52.4°C at the coast.
There is little influence of sea water on the chemical composition on the hot springs at low tide.
During drilling, temperatures of > 47°C were observed under the ground at 35 m depth below sea level, at a distance of 50 m from the Mizunashi coast.

Sources
- Smithsonian / GVP volcano information
- Japan National Tourism Organization
- link www.volcanolive.com/esan.html>John Seach, E-san volcano information

1874 eruption
On 8 June 1874, a minor eruption occurred at E-san volcano.

1846 eruption
On 18 Nov 1846, a phreatic eruption occurred at Esan volcano. It produced lahars, causing many fatalities and damage to houses.

See also: Sentinel hub | Landsat 8

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