Lumajang, Jawa Timur, June 24 -- Mount Semeru, located on the border of Lumajang and Malang districts in East Java, erupted on Wednesday, spewing an ash column 600 meters above its summit.

An eruption occurred at Mount Semeru on Wednesday June 24, 2026, at 06:22 a.m. Western Indonesian Time with the observed eruption column reaching around 600 meters above the summit, or 4,276 meters above sea level, Mount Semeru Observation Post Officer Yadi Yuliandi said in a written report received in Lumajang on Wednesday.

According to Yadi, the eruption produced a thick gray ash column that drifted westward. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and lasted 130 seconds.

Based on observations from midn...