Lumajang, E Java, Aug. 3 -- Mount Semeru in East Java erupted four times on Sunday morning, spewing ash columns reaching up to 900 meters above the summit.

The first eruption was recorded at 12.11 a.m. local time, producing a white ash column that rose 400 meters above the summit, or 4,076 meters above sea level.

"The ash column was observed to be white to gray with moderate intensity, heading southwest," Mount Semeru observation officer, Liswanto, confirmed in a written report.

The second eruption was recorded at 05.17 a.m. local time, sending an ash column around 900 meters high above the summit, or 4,576 meters above sea level.

"The ash column was observed to be white to gray with moderate intensity, heading south," he said.

The v...