Science & Technology

Mount Aso – The Largest Active Volcano in Japan

Mount Aso Japan

Mount Aso, the most important lively volcano in Japan, is featured on this picture captured on January 1, 2022, by the Copernicus Sentinel-2 mission. Credit: Contains modified Copernicus Sentinel knowledge (2022), processed by ESA, CC BY-SA 3.0 IGO

Mount Aso, the most important lively volcano in Japan, is featured on this picture captured by the Copernicus Sentinel-2 mission.

Mount Aso, positioned within the Kumamoto Prefecture on the nation’s southernmost essential island of Kyushu, rises to a top of 1592 meters (5,223 ft). The Aso Caldera is likely one of the world’s largest calderas, stretching round 120 km (75 miles) in circumference, 25 km (16 miles) north to south, and 18 km (11 miles) east to west.

The caldera was shaped throughout 4 main explosive eruptions that occurred between 90,000 and 270,000 years in the past. This resulted in huge pyroclastic flows and volcanic ash that blanketed a lot of the Kyushu area and even reached the neighboring Yamaguchi Prefecture.

The caldera is surrounded by 5 peaks recognized collectively as Aso Gogaku: Nekodake, Takadake, Nakadake, Eboshidake, Kishimadake. Nakadake is the one lively volcano on the middle of Mount Aso and is the principle attraction within the area. The volcano goes by cycles of exercise. At its calmest, the crater fills with a lime inexperienced lake that lightly steams, however as exercise will increase, the lake boils off and disappears. The volcano has been erupting sporadically for many years, most lately in 2021, which has led to the variety of guests drop lately.

Not removed from the crater lies Kusasenri: an unlimited grassland contained in the mega crater of Eboshidake. Active simply over 20,000 years in the past, the crater has been stuffed with volcanic pumice from different eruptions, with magma nonetheless brewing a number of kilometers under. Rainwater usually accumulates on the plain forming non permanent lakes. The pastures are used for cattle elevating, dairy farming, and horse driving.

One of the closest populated cities is Aso, seen within the picture round 8 km (5 miles) north of the volcano. It has a inhabitants of round 26,000 individuals.

There are 110 lively volcanoes in Japan, of which 47 are monitored intently as they’ve erupted lately or proven worrying indicators together with seismic exercise, floor deformation, or emissions of huge quantities of smoke.

Satellite knowledge can be utilized to detect the slight indicators of change which will foretell an eruption. Once an eruption begins, optical and radar devices can seize the assorted phenomena related to it, together with lava flows, mudslides, floor fissures, and earthquakes. Atmospheric sensors on satellites can even establish the gases and aerosols launched by the eruption, in addition to quantify their wider environmental impression.

This picture can also be featured on the Earth From Space video program embedded above.

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