• Strong earthquake swarm shakes Katla volcanic system beneath Mýrdalsjökull, Iceland

    ByTeo Blašković

    A strong seismic swarm began beneath Iceland’s Mýrdalsjökull glacier, part of the Katla volcanic system, around 10:30 UTC on October 20, 2025. Several earthquakes above magnitude 3 were recorded, the largest reaching M4.5 at 10:51 UTC. The Icelandic Meteorological Office reports no felt activity and no changes in river levels, conductivity, or deformation, indicating no immediate signs of eruption at the Katla volcano or glacial flooding.

  • Record lava fountains reach 460 m (1 500 feet) during episode 35 of Kīlauea summit eruption, Hawai‘i

    ByTeo Blašković

    Episode 35 of the ongoing Halemaʻumaʻu eruption at Kīlauea volcano began at 20:05 HST on October 17, 2025 (06:05 UTC on October 18), producing simultaneous fountains from the north and south vents that reached record heights of approximately 460 m (1 500 feet). The eruption cloud rose above 6 000 m (20 000 feet) while lava flows remained contained within the crater.

  • High-level eruption at Lewotobi volcano, Indonesia

    ByTeo Blašković

    A high-level eruption occurred at Lewotobi Laki-laki volcano on Flores Island, Indonesia, at 23:37 WITA (15:37 UTC) on October 14, 2025, producing an ash column rising to 13 700 m (44 500 feet) above sea level. The Darwin Volcanic Ash Advisory Center (VAAC) raised the Aviation Color Code to Red after Himawari-8 satellite imagery confirmed ash extending northwest at approximately 28 km/h (17 mph).

  • 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).

  • Kronotsky volcano awakens after a century, sending ash up to 9 km (30 000 feet) a.s.l., Russia

    ByTeo Blašković

    Kronotsky volcano in Kamchatka, Russia, erupted at 03:50 UTC (15:50 LT) on October 4, 2025, ending a century of dormancy. The Kamchatka Volcanic Eruption Response Team (KVERT) reported an explosive eruption with an ash column reaching 9.2 km (30 180 feet) above sea level. Aviation Color Code was raised to Red. KVERT warns that additional ash emissions rising up to 15 km (49 200 feet) remain possible.

  • Dual lava fountains from Kīlauea’s Halemaʻumaʻu crater reach 400 m (1 300 feet), Hawaii

    ByTeo Blašković

    Episode 34 of the ongoing Kīlauea eruption ended at 07:03 HST (17:03 UTC) on October 1, 2025, after 6 hours of lava fountaining from two vents in Halemaʻumaʻu crater at the volcano’s summit, Hawaii. Lava fountains reached up to 400 m (1 300 feet), erupting about 9 million m³ of lava at a peak effusion rate of 500 yd³/s. The eruption filled much of the western crater floor before activity ceased.

  • Increased seismicity and gas emissions at Meakandake volcano, Hokkaido, Japan

    ByTeo Blašković

    The Japan Meteorological Agency (JMA) raised the Alert Level for Meakandake volcano in Hokkaido, Japan, from 1 to 2 at 06:20 UTC (15:20 JST) on September 15, 2025, after an increase in seismicity near Ponmachineshiri Crater. From September 16 to 23, eruptive activity continued with 27–50 daily volcanic earthquakes, minor ashfall, and white steam-and-gas plumes rising 200–800 m (656–2 625 feet) above the crater rim. Access within 500 m (1 640 feet) of the crater remains restricted, affecting parts of Kushiro City and Ashoro Town.