In January 2022, Hunga-Tonga Hunga-Ha’apai (HT-HH) emitted the biggest atmospheric explosion recorded on Earth in more than 100 years. Several months after the eruption, a New Zealand-led team has completed the fullest investigation to date into the eruption of this underwater Tongan volcano.
Seismic activity under Takawangha volcano, Alaska increased over the past couple of days and intensified on November 18, 2022, forcing the Alaska Volcano Observatory (AVO) to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory.
New activity/unrest was reported for 4 volcanoes from November 9 to 15, 2022. During the same period, ongoing activity was reported for 28 volcanoes.
Minor volcanic unrest continues at New Zealand’s Taupō volcano, as shown by continued small earthquakes and ground deformation. The Volcanic Alert Level remains at 1.
Etna showed signs of increased unrest on November 15, 2022, forcing the Etna Volcano Observatory to raise the Aviation Color Code for the volcano from Green to Yellow. It was lowered back to Green at 10:20 UTC on November 16 after geophysical parameters returned to background levels.
A new lava flow formed on Stromboli volcano, Italy on November 16, 2022. The activity follows major explosive eruptions at the end of September and significant pyroclastic flows in October.
A submarine volcanic activity appears to be taking place in the Ahyi seamount volcano area, the Northern Mariana Islands since mid-October 2022. The last eruption at this volcano took place in 2014.
New activity/unrest was reported for 4 volcanoes from November 2 to 8, 2022. During the same period, ongoing activity was reported for 20 volcanoes.
The Alert Level for Villarrica volcano, Chile has been raised from Green to Yellow on November 8, 2022. The decision was made due to increased activity detected at the volcano over the past 30 days. The current eruptive episode began in December 2014.
A new analysis published in Science shows the eruption at Hunga Tonga–Hunga Haʻapai volcano in Tonga on January 15, 2022, created the highest volcanic plume ever recorded. This is the first time a volcanic plume has been seen to penetrate the stratopause.
