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Indonesia Raises Mount Semeru to Highest Alert as Eruption Forces Mass Evacuations

Preparedness reflects lessons from Semeru’s deadly 2021 eruption on the Pacific Ring of Fire.

Overview

  • Authorities kept the alert at Level IV after Wednesday’s blast, with activity easing by Thursday yet remaining fluctuating.
  • More than 1,000 people were moved to shelters such as schools and mosques, with some residents working by day and staying in safe locations overnight.
  • Local officials reported homes partly buried by ash and rock, at least one primary school destroyed, and at least three people suffering burn injuries.
  • Rangers evacuated about 190 people, mostly hikers, from a campsite outside the zone directly affected by the eruption.
  • Officials gave differing plume measurements, with estimates ranging from more than 13 kilometers of dispersed material to 8.5 kilometers above the summit, while Bali’s Ngurah Rai airport reported normal flight operations.