Lumajang, East Java, Jan. 19 -- Mount Semeru, which stands 3,676 meters above sea level in East Java, erupted six times on Monday morning, producing ash plumes ranging from 300 meters to 1 kilometer in height.

The first eruption occurred at 12:22 a.m., followed by subsequent eruptions at 12:36 a.m., 12:50 a.m., 5:19 a.m., 6:44 a.m., and 8:36 a.m.

"The highest eruption occurred at 5:19 a.m., with an observed eruption column height of approximately 1,000 meters above the summit," an officer at the Mount Semeru Observation Post, Liswanto, informed on a report on Monday.

According to him, the ash column was observed to be white to gray in color with moderate intensity, drifting toward northeast.

Mount Semeru's activity on Monday, from 12:...