The Alaska Volcano Observatory (AVO) has identified a slight rise in the seismic activity at the volcano.
This might potentially indicate a new magma injection deep within the volcano. An extended disruption in the local seismic network from February to April 2024 makes it challenging to pinpoint the exact onset of this activity. However, heightened seismicity has been noted since the network resumed operation on 3 April. On average, 4 earthquakes per day have been recorded by the seismograph since then, with a peak of 33 on 26 April. These earthquakes have generally been small, with magnitudes less than M 1.0, and have occurred at depths ranging from near the volcano’s summit to as far as 18 miles (30 km) below sea level. This surge in seismic activity includes an increase in low-frequency earthquakes at depths exceeding 12.4 miles (20 km), which are likely linked to fluid migration.
Additionally, minor ground uplift of approximately 0.4 inches (1 cm) has been detected through local GPS data since November 2023, deviating from the long-term trend, possibly correlated with the seismic activity. However, there have been no significant alterations observed in ice and snow cover or gas and steam emissions in conjunction with these geophysical observations. Under clear conditions, slight steaming is commonly visible from fumaroles in the summit crater area.
Source: Alaska Volcano Observatory volcano activity update 16 May 2024