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Krakatau in Indonesia sent an estimated volcanic ash plume to 8,000 feet, according to a Darwin Volcanic Ash Advisory Center bulletin issued October 21. The advisory said the ash was moving west at 20 knots, while the observed cloud extended from the surface to flight level 080, or about 8,000 feet. The bulletin cited Indonesia’s CVGHM and Himawari-9 satellite imagery as information sources and said satellite observations identified the plume. Forecasts projected the ash cloud’s area through 18 hours after the observation.

Disclosure: This video contains stock footage and content created or enhanced using AI-assisted tools.

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00:00Ash from Krakatau's continuing eruption is forecast to move west over Indonesia, not clear
00:05away. Darwin's Ash Forecasting Center keeps the cloud west of the volcano for the next 18 hours.
00:12The center issued that outlook on October 21. While explosive activity continued at the volcano,
00:18satellite images show the eruption continuing, with ash reaching an estimated 8,000 feet above
00:24sea level. The forecast keeps ash between the surface and that height throughout the same
00:28period. But the height comes from temperatures and satellite images, rather than a direct
00:33measurement. Weather models put the clouds' westward movement at 20 knots, also without direct
00:39measurements. So the outlook tracks where ash could move while volcanic activity continues.
00:44The next volcanic ash advisory is due by 11.25 UTC. For now, westward ash movement remains the
00:53forecast, not a measured certainty. Disclosure. This video contains stock footage and content
00:58created or enhanced using AI-assisted tools.
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