Massive Mt. Ruang eruption sends plumes nearly 70,000 feet high

Indonesia’s Mount Ruang has erupted at least three times this week, forcing the evacuation of hundreds of people. On Wednesday evening local time, the volcano’s eruption shot ash nearly 70,000 feet high, possibly spewing aerosols into the stratosphere, the atmosphere’s second layer.

The volcano is part of Indonesia’s North Sulawesi province, in the Sangihe Islands archipelago. That puts it about 60 miles north-northeast of Manado, the province’s capital. Indonesia’s National Disaster Management Agency posted on X that the situation corresponded to a Level 3 on a 1-through-4 scale, with 4 being the most severe.Satellite imagery depicted a massive eruption around 8 p.m. Wednesday local time, which shot ash about 65,000 to 70,000 feet high. That’s roughly twice the altitude at which commercial aircraft fly.that monitor the location and movement of volcanic ash clouds, because they can pose major dangers to aviation and cannot be tracked on radar.

The summit of Ruang stands 10,932 feet above sea level, with a caldera that is about two miles wide. Eruptions are relatively common, though explosions this high are rare. When volcanic aerosols make it into the stratosphere, they can have minute effects on Earth’s climate. The stratosphere begins around 20,000 feet above the ground at the poles, but 60,000 feet or so in the tropics. It is too early to know how much material, if any, made it into the stratosphere, which is above the troposphere, or the lowest layer of Earth’s atmosphere. Weather occurs primarily in the troposphere.

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