Home Reef volcano re-emerged above sea level on September 9, 2022, prompting authorities in Tonga to issue a Hazard Alert to all marines to sail at least 5 km (3.1 miles) away from the volcano. The volcano is located midway between Metis Shoal and Late Island in the central Tonga islands. It was first reported active in the mid-19th century when an ephemeral island formed.
A seismic swarm started in under the Laguna del Maule volcanic complex in Chile on October 1, 2022.
Ash emissions at Nishinoshima volcano, Japan increased on October 2 and 3, 2022, after more than 12 months of relative quiescence.
Indonesian PVMBG is reporting increased activity under the Sorikmarapi stratovolcano, North Sumatra, Indonesia. The last eruption at this volcano took place in 1986 (VEI 1).
A major explosion took place at Stromboli volcano, Italy 13:24 UTC on September 29, 2022, from its North crater area.
The swarm of earthquakes that began on August 24, 2022, beneath Trident stratovolcano, Alaska, U.S. continues. The last eruption of this volcano took place in 1974 (VEI 3).
New activity/unrest was reported for 4 volcanoes from September 21 to 27, 2022. During the same period, ongoing activity was reported for 17 volcanoes.
Moderate volcanic activity continues at Alaid volcano, Russia, with ash emissions rising up to 3 km (10 000 feet) above sea level at 05:20 UTC on September 27, 2022, according to the Tokyo VAAC.
Seismic activity beneath the Mauna Loa volcano has been gradually increasing over the past 2 months. In addition, a small seismic swarm started on September 23, with most earthquakes in a cluster about 5 km (3.1 miles) wide and -2 to 1 km (-1.2 to 0.6 miles) below the surface. The Aviation Color Code is at Yellow and the Volcano Alert Level at Advisory.
New activity/unrest was reported for 4 volcanoes from September 14 to 20, 2022. During the same period, ongoing activity was reported for 18 volcanoes.
