Mount Semeru erupts Sunday morning after Anak Krakatau eruption

Mount Semeru in East Java erupted at 7:51 a.m. Sunday, sending an ash column about 1,000 meters above the summit.

Indonesia’s Geological Agency recorded the eruption on a seismograph, with a maximum amplitude of 23 millimeters and a duration of 102 seconds.

The agency advised people not to conduct activities in the southeastern sector along Besuk Kobokan, up to 13 kilometers from the summit. Beyond that distance, it warned people to stay at least 500 meters from the riverbank because hot clouds and lahars could spread as far as 17 kilometers from the summit.

Authorities also advised people to remain outside a five-kilometer radius from the crater or summit because of the risk of incandescent rocks. They warned of possible hot clouds, falling lava and lahars along rivers and valleys originating at the summit, especially Besuk Kobokan, Besuk Bang, Besuk Kembar and Besuk Sat.