Digital elevation model of Mount St. Helens volcano and earthquake density during 1987-2004. Areas with a lot of earthquakes are in blue, while areas with fewer earthquakes are shown in oranges and browns. The earthquakes associated with the current episode are shown in orange (image: CVO)
The Cascades Volcano Observatory (CVO) reported that a seismic activity at the volcano has been elevated over the past three months.
More than 400 earthquakes have been monitored by the local seismic network since 15 July. In late August to early September, approx. 40-50 quakes/week were located. Despite the increased seismic activity, the volcano remains at the background levels.
No significant changes have been observed in other monitoring parameters and there are no signs of an imminent eruption.
Source: Cascades Volcano Observatory volcano activity update 31 October 2023