More than 25 million m³ (883 million ft³) of magma has accumulated beneath Svartsengi, Iceland, since the last eruption in July 2025, the Icelandic Meteorological Office (IMO) reported on April 28, 2026. IMO said ground uplift continues at up to 2 cm (0.8 inches) per month, while magmatic dike propagation toward the Sundhnúkur crater row remains the most likely scenario and could lead to an eruption.
Lava fountains rising to 300 m (1 000 feet) and an ash plume reaching 5 000 m (16 500 feet) marked the onset of episode 45 at Kīlauea on April 23, 2026, triggering an ashfall advisory for Kaʻū. Activity remained confined within Halemaʻumaʻu as fountain heights stabilized after an early peak.
Authorities raised the volcanic alert level to V1 in the Faial–Pico channel, Azores, Portugal, on April 9, 2026, following low-magnitude seismic activity that began on April 1. The earthquakes occurred along a NE–SW trend west of Madalena to north of Lagido, spanning depths from 20 km (12 miles) to near the surface. The last known eruption at this volcano took place in 1720, with a Volcanic Explosivity Index (VEI) of 2.
Mount Dempo in South Sumatra, Indonesia, erupted at 04:45 UTC on April 15, 2026, sending volcanic ash as high as 7.6 km (25 000 feet) above sea level and prompting Indonesia’s volcano agency to raise the Aviation Color Code to Red. The eruption follows a phreatic blast on April 7 and inflation detected from April 2.
Tephra up to 25 cm (10 inches) was reported in the Volcano Golf Course subdivision near Kīlauea, Hawaiʻi, during episode 44 of the ongoing summit eruption, which ended at 05:41 UTC on April 10, 2026, after 8 hours and 31 minutes of lava fountaining. The eruption generated 5.8 million m³ (7.5 million cubic yards) of lava, while ash and Pele’s hair reached as far as Hilo, prompting warnings and temporary closures.
Explosive activity at Sheveluch volcano, Kamchatka, Russia, sent volcanic ash to 11 km (36 000 feet) above sea level on March 29, 2026, prompting authorities to raise the Aviation Color Code to Red.
An explosive eruption occurred at Semeru volcano in East Java, Indonesia, at 08:49 LT (01:49 UTC) on March 29, 2026, producing an ash plume rising 800 m (2 625 feet) above the summit and a pyroclastic density current traveling 3.5 km (2.2 miles) toward the Besuk Kobokan drainage.
A new volcanic eruption occurred at Whakaari/White Island, New Zealand, at 17:35 LT on March 24, 2026, producing a dark grey ash plume rising to about 1 300 m (4 265 feet) above the vent. Authorities raised the Volcanic Alert Level to 3 and the Aviation Color Code to Orange following the event. Activity has since ceased, but further explosive events remain possible with little or no warning.
Explosive activity at Sheveluch volcano on the Kamchatka Peninsula, Russia, produced a volcanic ash plume rising to approximately 10.4 km (34 000 feet) altitude at 11:20 UTC on March 16, 2026, drifting east across the North Pacific. Satellite imagery from Himawari-9 detected the ash cloud moving east at around 110 km/h (70 mph). The Aviation Color Code remains at Orange.
Lava from an ongoing eruption at Piton de la Fournaise entered the Indian Ocean along the southeastern coast of Réunion Island at about 00:20 local time on March 16, 2026, after advancing downslope through the Grand Brûlé lava field and crossing the RN2 coastal road several days earlier, producing steam plumes and localized hazards where molten rock met seawater.
