Low-level ash emissions were observed at Pavlof volcano, Alaska on August 5, 2021, prompting the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code to Orange and Alert Level to Watch. In addition, seismic tremor and small explosions have been detected…
Increased seismicity and gas and ash emissions were observed at Savo volcano, Solomon Islands at the end of July, prompting authorities to deploy technical teams, increase monitoring and issue Volcano Safety Messages to residents. Savo has been the source of major…
New activity/unrest was reported for 7 volcanoes from July 28 to August 3, 2021. During the same period, ongoing activity was reported for 16 volcanoes. New activity/unrest: Dieng Volcanic Complex, Central Java (Indonesia) | Great Sitkin, Andreanof Islands (USA) |…
A strong long-period earthquake activity (LP) was registered at a newly-discovered underwater volcano near Mayotte starting at 16:33 UTC on July 31, 2021. A total of 186 LP earthquakes were recorded in three separate swarms, each associated with a very long-period…
The month of July saw the most energetic swarm of earthquakes in the region since the Maple Creek earthquake swarm of June-September 2017, the Yellowstone Volcano Observatory (YVO) reported in their monthly update released August 2, 2021. While above average, this…
Unrest under Semisopochnoi volcano increased at the end of July, with a marked increase in seismicity on July 31. Increased activity has also been detected on local infrasound stations, suggesting possible low-level (below 3 km / 10 000 feet above sea level)…
A major explosive eruption took place at Stromboli volcano, Italy at 20:09 UTC on August 1, 2021. This is the second larger than usual explosion at the volcano since July 28. Analysis of the event indicated that the eruptive activity produced a significant emission…
Etna entered August 2021 with continued growth at its Southeast Crater and impressive paroxysmal eruptive episode, the first since July 20. Strombolian activity at the crater gradually intensified into lava fountaining by 21:22 UTC on July 31. The episode lasted…
Local residents are reporting increased seismicity and light emissions from Pagan volcano, Northern Mariana Islands, prompting NMI/USGS to raise the Aviation Color Code to Yellow. The last eruption of this volcano took place in 2012 (VEI 2). Ground-based…
A strong explosive eruption took place at Stromboli volcano, Italy at 14:47 UTC on July 28, 2021. The explosion was energetically more intense than usual, INGV-OE said. Volcanic products were radially dispersed in the crater area with fallout along the Sciara del…
