Increased Seismic Activity at Mount Spurr Signals Possible Eruption Imminence
Alaska’s Mount Spurr is under close observation due to heightened seismic activity, with approximately 125 earthquakes being recorded weekly. Possible eruption scenarios include small explosive events similar to those in 1953 and 1992 or a quieter phase where seismic activity subsides. Monitoring continues using various advanced technologies to determine any imminent eruption threat.
Geologists are intensively monitoring Mount Spurr in Alaska’s Aleutian Arc due to increased seismic activity indicating potential volcanic unrest. The Alaska Volcano Observatory (AVO) reports that an eruption could occur within days or weeks, with seismic events reaching approximately 125 earthquakes weekly as of early February.
Mount Spurr is a stratovolcano characterized by its significant ice and snow cover. Historically, it has erupted twice, in 1953 and 1992, with both eruptions originating from the Crater Peak flank rather than Mount Spurr itself. Each event produced small yet explosive ash clouds that affected parts of Alaska and beyond, even drifting across the North Atlantic.
Following an uptick in seismic events starting April 2024, AVO indicated a correlation with new magma intrusion beneath the volcano. They outlined several possible scenarios, including a potential eruption comparable to past events or the possibility that no magma will reach the surface at all, resulting in decreased seismic activity.
A less probable scenario involves an eruption at Mount Spurr’s summit, which could be explosive and result in significant melting of glacial ice, leading to hazardous lahars. The area surrounding Mount Spurr is largely uninhabited; however, potential eruptions could still disrupt air travel.
The AVO employs a range of monitoring techniques, including seismic networks and infrasound sensors, to track the volcanic activity closely. Further monitoring and data collection will be essential to determine the likelihood of an imminent eruption.
In summary, Mount Spurr is currently exhibiting signs of increased volcanic activity, raising the likelihood of a potential eruption soon. While historical eruptions have been localized and largely affected uninhabited areas, the situation necessitates vigilance due to the risk of ash dispersal and disruptions to air travel. Ongoing monitoring efforts will play a critical role in assessing the situation further.
Original Source: www.iflscience.com
