Seismicity under Machín volcano started increasing at 11:23 LT on December 2, 2022, with signals indicating rock fracturing. This small but explosive volcano is located at the southern end of the Ruiz-Tolima massif. Its last eruption took place in 1180 CE.
Earthquake swarm under Takawangha volcano, Alaska continues since mid-November. The Aviation Color Code remains at Yellow and the Volcano Alert Level at Advisory. The last known eruption at this volcano took place in 1550 CE (VEI unknown).
More than 600 aftershocks have been recorded following the M5.6 earthquake beneath Lake Taupō, New Zealand on November 30, 2022 — one of the largest recorded in Lake Taupō region. No further unusual activity has been observed and the minor volcanic unrest at Taupō volcano continues. The Volcanic Alert Level remains at 1.
About 20 m (65.6 feet) of foreshore in Wharewaka, Lake Taupo, New Zealand disappeared after a strong and shallow M5.6 earthquake and numerous aftershocks at Taupō volcano at the end of November 2022.
Intense explosions and large pyroclastic flows took place at Stromboli volcano, Italy on December 4, 2022, generating a small local tsunami.
A high-level eruption occurred at Indonesia’s Semeru volcano on December 4, 2022, prompting authorities to raise the Alert Level from III to IV. The last major eruption at this volcano took place on December 4, 2021, leaving 51 people dead and several hundred others injured.
New activity/unrest was reported for 6 volcanoes from November 23 to 29, 2022. During the same period, ongoing activity was reported for 17 volcanoes.
The eruption of Mauna Loa volcano that started on November 28, 2022, in its Northeast Rift Zone continues, with several fissures and lava flows active.
Seismic unrest continues at Taupō volcano, New Zealand, with a strong and shallow M5.6 earthquake registered on November 30, 2022. The Volcanic Alert Level for Taupō volcano was increased to Level 1 on September 20, 2022. This was based on ongoing earthquakes and deformation at levels above typical background since May.
Satellite and remote geophysical data show signs of unrest at Ahyi Seamount, Northern Mariana Islands, prompting the USGS to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory on November 28, 2022.