The Weekly Volcanic Activity Report: March 12-18, 2026
New activity/unrest was reported for 7 volcanoes from March 12 to 18, 2026. During the same period, ongoing activity was reported for 20 volcanoes.

New activity/unrest was reported for 7 volcanoes from March 12 to 18, 2026. During the same period, ongoing activity was reported for 20 volcanoes.

More than 23 million m³ (812 million feet³) of magma have accumulated beneath the Svartsengi volcanic system on Iceland’s Reykjanes Peninsula since the July 2025 eruption. Monitoring data released March 17, 2026, by the Icelandic Meteorological Office show this is the largest magma accumulation between eruptions since activity began on the Sundhnúksgígar crater row in December 2023. The official hazard assessment for the area remains unchanged and is valid until March 31.

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.

An explosive eruption occurred at Kanlaon volcano on Negros Island, central Philippines, at 18:07 LT (10:07 UTC) on March 15, 2026, producing an ash plume rising more than 5 km (3.1 miles) above the summit and depositing ashfall across at least 54 barangays in 11 local government units. Monitoring data associated with the event recorded nine volcanic earthquakes and sulfur-dioxide emissions of about 1 085 tonnes per day. Authorities also reported vegetation fires on the volcano’s slopes and suspended classes in several municipalities on March 16 as a precaution.

Lava from an ongoing eruption at Piton de la Fournaise crossed the RN2 coastal road in the Grand Brûlé sector of Réunion Island early March 13, 2026, cutting a key transport link between the island’s southern and eastern regions.

A weak eruption was detected at Whakaari / White Island volcano in the Bay of Plenty, New Zealand, on the morning of March 12, 2026, prompting authorities to raise the Volcanic Alert Level from 2 to 3 and the Aviation Colour Code from Yellow to Orange. According to GeoNet monitoring data, ash was observed in a low-level plume above the main vent, with ashfall confined to the crater floor.

Episode 43 of the ongoing eruption at Kīlauea began at about 09:17 LT on March 10, 2026, producing lava fountains exceeding 400 m (1 300 feet) from vents inside Halemaʻumaʻu crater, according to the USGS Hawaiian Volcano Observatory (HVO). Tephra fallout forced the closure of part of Highway 11 and disrupted flights at Hilo International Airport as an ash plume rose to about 9 km (30 000 feet) above sea level.

Ambae’s Manaro Voui volcano remained in minor eruption on March 6, 2026, as Vanuatu’s government approved emergency response measures after acid rain and ash impacts spread beyond the island. Authorities maintained Alert Level 3 and prepared evacuation plans in case activity escalates further, but said no mass evacuation had been ordered at this stage.

Magma continues to accumulate beneath the Svartsengi volcanic system on the Reykjanes Peninsula, Iceland, as of March 3, 2026. The Icelandic Meteorological Office reports that uplift remains steady, seismic activity is minimal, and the total stored magma has reached about 22.5 million cubic meters since the last eruption in July 2025.