Lumajang, East Java, July 15 -- Mount Semeru, an active volcano located across the Lumajang and Malang districts in East Java, erupted four times on Tuesday morning, sending ash clouds up to 1.2 kilometers above its peak in the latest activity.

"Mount Semeru erupted at 7:15 a.m. local time, with an ash column observed reaching approximately 1,200 meters above the summit, or 4,876 meters above sea level," Liswanto, an officer at the Mount Semeru Observation Post, remarked.

In a written report received in Lumajang, he noted that the ash columns appeared white to gray with moderate intensity and drifting southward as the report was compiled.

According to the observation officer, the tallest mountain on Java Island had already erupted at 4...