According to Indonesia's Volcanology and Geological Hazard Mitigation Center, Mount Semeru in East Java erupted at 5:29 am local time on Oct. 6, with an ash plume reaching about 900 meters. The eruption lasted 135 seconds. The ash was gray and dense, spreading to the northeast.
Mount Semeru, at 3,676 meters above sea level, is the highest volcano on Java. Indonesia lies on the Pacific Ring of Fire, leading to frequent volcanic and seismic activity.
Since the start of this year, Mount Semeru has been frequently active. Data from Indonesia's volcanic monitoring system shows that as of Oct. 6, Semeru has recorded 1,922 eruptions this year, making it the most active volcano in Indonesia this year. During the same period, Indonesia recorded a total of 4,946 volcanic eruptions nationwide.
The most recent major eruption of Mount Semeru occurred on the morning of Sep. 14, when it erupted three consecutive times, with ash columns reaching up to 1,000 meters, spreading to the northwest, north, and east respectively.
Currently, Mount Semeru remains at Level III alert. Authorities are reminding the public not to engage in activities within a 5-kilometer radius of the crater and summit.
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