The Weekly Volcanic Activity Report: September 7 – 13, 2022
New activity/unrest was reported for 4 volcanoes from September 7 to 13, 2022. During the same period, ongoing activity was reported for 18 volcanoes.
Earthquake swarm under Trident stratovolcano, Alaska
A seismic swarm started under Trident stratovolcano, Alaska on August 24, 2022, likely driven by the movement of magma or magmatic fluids. The swarm is still in progress but now at a decreased rate. The last eruption of this volcano took place in 1974 (VEI 3).
Home Reef volcano re-emerges above sea level, Tonga
Home Reef submarine volcano in Tonga started erupting on September 9, 2022 and re-emerged above sea level. The activity at the volcano is fumarolic, releasing gas into the atmosphere up to 1 km (3 200 feet) above sea level. A Hazard Alert was issued to all marines to sail at least 5 km (3.1 miles) away from the volcano.
Earthquake swarm under Ta’u volcano continues with declining frequency, American Samoa
The earthquake swarm under Ta’u Island volcano that started in July 2022 continues with declining frequency. However, the current trend of decreasing numbers of earthquakes does not mean the earthquake swarm will end.
The Weekly Volcanic Activity Report: August 31 – September 6, 2022
New activity/unrest was reported for 5 volcanoes from August 31 to September 6, 2022. During the same period, ongoing activity was reported for 18 volcanoes.
Area of earthquake locations extending from deep beneath Ta’u Island volcano to about 10 km (6 miles), American Samoa
The earthquake swarm that started under Ta’u volcano, American Samoa, at the end of July 2022 continues with no significant change.
The Weekly Volcanic Activity Report: August 24 – 30, 2022
New activity/unrest was reported for 5 volcanoes from August 24 – 30, 2022. During the same period, ongoing activity was reported for 16 volcanoes.
Earthquake swarm under Ta’u volcano continues, American Samoa
The earthquake swarm related to Taʻū Island, American Samoa that started in late July 2022 continues. The Aviation Color Code remains at Yellow.
The Weekly Volcanic Activity Report: August 17 – 23, 2022
New activity/unrest was reported for 8 volcanoes from August 17 to 23, 2022. During the same period, ongoing activity was reported for 15 volcanoes.
Aviation Color Code for Ta’u and Ofu-Olosega volcanos raised to Yellow, American Samoa
The earthquake swarm that started in the Manua’ Islands, American Samoa on July 26, 2022, continues without abating. As a result, the Hawaiian Volcano Observatory (HVO) has raised the Aviation Color Code for Ta’u and Ofu-Olosega volcanos to Yellow.
