The Weekly Volcanic Activity Report: April 9-15, 2026
New activity/unrest was reported for 3 volcanoes from April 9 to 15, 2026. During the same period, ongoing activity was reported for 17 volcanoes.
Mount Dempo eruption sends ash up to 7.6 km (25 000 feet) above sea level, Indonesia
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) reported in the Volcano Golf Course subdivision during Kīlauea eruption episode 44, Hawaiʻi
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.
The Weekly Volcanic Activity Report: April 2-8, 2026
New activity/unrest was reported for 6 volcanoes from April 2 to 8, 2026. During the same period, ongoing activity was reported for 17 volcanoes.
Explosive eruption at Sheveluch sends ash to 11 km (36 000 feet), Aviation Code Raised to Red, Russia
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.
Semeru eruption sends pyroclastic flow 3.5 km (2.2 miles) down Besuk Kobokan, Indonesia
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.
The Weekly Volcanic Activity Report: March 19-25, 2026
New activity/unrest was reported for 4 volcanoes from March 19 to 25, 2026. During the same period, ongoing activity was reported for 22 volcanoes.
Eruption at White Island raises Alert Level to 3 after brief ash plume, New Zealand
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.
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.
Magma accumulation beneath Svartsengi now largest since eruption sequence began, Iceland
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.
