"Remembering the 1980 Mount St. Helens Eruption and Monitoring Active Volcanoes"
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"Remembering the 1980 Mount St. Helens Eruption and Monitoring Active Volcanoes"
[!CDATA[Forty-five years ago, on May 18, 1980, Mount St. Helens in Washington experienced a violent eruption. The eruption was preceded by a series of earthquakes and smoke emissions in March and April. The mountain's north side witnessed massive landslides and a bulge that grew rapidly up the mountainside. At 8:32 a.m. on May 18, a magnitude 5.1 earthquake triggered a significant landslide, leading to the eruption of Mount St. Helens. The eruption caused the death of 57 people and resulted in a lateral blast that devastated 230 square miles of forest within minutes. Before the 1980 eruption, Mount St. Helens was a steep, conical volcano often compared to Mount Fuji. The eruption removed the upper 1,300 feet of the summit through a massive debris avalanche, sending a plume of ash 12 miles high within the first 10 minutes. The volcanic ash cloud from Mount St. Helens' eruption traveled east across the United States in three days and circled the Earth in 15 days. The U.S. Geological Survey states that Mount St. Helens has been formed through four eruptive stages over 275,000 years and is the most active volcano in the Cascade Range. Mount St. Helens is classified as a stratovolcano and has experienced eruptions in 1980, 2004-2008. Currently, its alert level is normal, but it poses a high threat potential. The map displays volcanoes with warming/minor activity in yellow and erupting ones in red as of May 14, along with recent earthquake locations. The Axial Seamount, an underwater volcano off Oregon's coast, has been monitored by volcanologists like Bill Chadwick from Oregon State University. The volcano recorded 1,000 earthquakes daily last month, indicating a potential eruption within the next year. Despite being a mile below sea level, the volcano is not a threat to humans. During the 2015 eruption of Axial Seamount, magma flowed out of the volcano, with one lava flow reaching nearly 450 feet in thickness. For more information on the Axial Seamount, visit the USGS website. California hosts several active volcanoes, which can be explored further through the California Department of Conservation. Stay informed about volcanic activity worldwide through interactive maps available online. In conclusion, the Mount St. Helens eruption of 1980 serves as a reminder of the destructive power of volcanoes. Monitoring and studying active volcanoes like the Axial Seamount are crucial for understanding volcanic behavior and mitigating potential risks to human populations and the environment.]]