• Planchón-Peteroa volcano enters new eruptive phase, Chile–Argentina border

    ByTeo Blašković

    A period of renewed eruptive activity occurred at Planchón-Peteroa volcanic complex on the Chile–Argentina border between late October and early November 2025. Volcanic Ash Advisory Center (VAAC) Buenos Aires issued multiple warnings for continuous ash emissions reaching altitudes of up to 4 600 m (15 000 feet). Local monitoring networks reported persistent degassing and minor explosions. The volcanic alert level remains at Yellow.

  • Fine ash emissions and increased tremor at Planchón-Peteroa, Chile–Argentina

    ByTeo Blašković

    The Argentine Geological and Mining Service (SEGEMAR) reported increased surface activity at the Planchón-Peteroa volcanic complex starting at 01:00 LT (04:00 UTC) on October 3, 2025, including emissions of fine volcanic ash rising up to 250 m (820 feet) above the crater. The technical alert remains at Yellow, with continued binational monitoring by SEGEMAR and Chile’s National Geology and Mining Service (SERNAGEOMIN).

  • Significant ground deformation triggers Yellow alert at Puyehue-Cordón Caulle volcanic complex, Chile

    ByTeo Blašković

    The Puyehue-Cordón Caulle Volcanic Complex in Chile was placed under a Yellow alert at 20:00 UTC on April 26, 2024. This decision followed observations of increased ground deformation linked to an active inflation zone, located 6 km (3.7 miles) west-northeast of the 2011 eruption site. Monitoring data have shown the highest deformation rates since measurements began, reaching up to 2.4 cm (0.95 inches) per month.

  • Increased volcanic activity observed at Chile’s Villarrica volcano

    ByTeo Blašković

    Increased volcanic activity was detected at the Villarrica volcano in Chile, starting on September 24, 2023, prompting officials to elevate the alert level to Orange. Evacuations have commenced in affected communes, and educational institutions have been temporarily closed.

  • Increased seismicity at Lascar volcano, Alert Level raised to Orange, Chile

    ByTeo Blašković

    Seismic activity around Chile’s Lascar volcano has increased over the past 2 days, causing Sernageomin to raise its Alert Level to Orange. The security perimeter around the crater was expanded to 10 km (6.2 miles), with the community urged to avoid unnecessary exposure to potential dangers. The seismicity is primarily linked to fluid dynamics within the volcanic system, which could be a result of the destabilization of a remnant magmatic body. This activity could lead to explosive events, potentially causing ashfall in the area.