Over 400 earthquakes occurred at Mount Rainier in a single day, raising public concern about a possible eruption. The US Geological Survey confirmed that Rainier is still an active volcano and emphasized monitoring efforts. Although Rainier hasn't erupted significantly in over a millennium, hot fluids circulating in the rock are causing the current seismic activity. These movements do not indicate the presence of rising magma. The earthquake activity remains minor, and the USGS maintains a GREEN / NORMAL alert level for the volcano.
More than 400 earthquakes rattled Mount Rainier over just 12 hours on Tuesday, sparking fears of a potential eruption due to volcanic unrest. The US Geological Survey emphasized that Rainier is still active, despite not having significant eruptions in over 1,000 years. The tremors are attributed to hot fluids circulating through rock fractures rather than rising magma. Monitoring continues with a network of sensors, although current earthquake activity is not cause for concern, remaining at a GREEN / NORMAL alert level.
Alex Iezzi clarified that the tremors at Mount Rainier are likely driven by hot fluids circulating through pre-existing fractures, generating small, frequent earthquakes as pressurized fluids shift surrounding rock. The USGS emphasizes that while these changes can precede serious volcanic activity, there is currently no indication of imminent danger.
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