Mount Adams, WA – Mount Adams, a dormant volcano in Washington, has seen a surge in seismic activity, sparking concerns that it could be reawakening. In September, six small earthquakes, ranging in magnitude from 0.9 to 2.0, were detected in the region. This marks the most significant seismic activity at the volcano in over 40 years.
According to the U.S. Geological Survey (USGS) Cascades Volcano Observatory, while there is no current evidence of an imminent eruption, the increased seismic activity is unusual. Historically, Mount Adams has been largely dormant, with its last eruption occurring thousands of years ago. The volcano is considered a high threat due to the potential for dangerous lahars—massive mudflows that can occur during volcanic activity or even during dormant periods.
Mount Adams’ increased seismic activity comes nearly 44 years after the catastrophic eruption of Mount St. Helens in 1980, which devastated the region and remains a stark reminder of the threat posed by the Cascade Range volcanoes. While Mount Adams’ recent activity has not reached that level, experts are taking no chances.
Scientists from the USGS and the Pacific Northwest Seismic Network (PNSN) plan to install additional seismic stations near Mount Adams. These will enhance the ability to detect smaller earthquakes and provide more accurate data about their size and location. Currently, there is only one seismic station in the area, limiting monitoring capabilities.
While there is no cause for alarm at this stage, the surge in earthquake activity at Mount Adams is a reminder of the unpredictable nature of volcanoes in the U.S. The USGS will continue to monitor the situation and release updates as necessary.
