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Semeru Erupts on Java With Highest Alert in Effect as Hundreds Shelter

The top alert remains in place over persistent activity, with lahar risk prompting continued evacuations.

Overview

  • Officials reported almost 900 people in shelters overnight and said 190 stranded hikers were rescued from the national park.
  • Pyroclastic flows swept down the south flank, with reported runouts ranging from about 7 to 14 kilometers, and numerous homes were damaged.
  • Authorities maintained exclusion zones and urged people to avoid the volcano’s southeastern sector due to ongoing hazards and possible lahars.
  • Ash plume heights varied by source, with Indonesia’s geology agency and several outlets citing roughly 2 kilometers while AFP reported up to 13 kilometers.
  • The geology agency said activity has eased compared with the peak, but the volcano remains active and the highest warning level stays in force, with no deaths confirmed and conflicting reports on injuries.