US West Coast faces high risk from overdue major earthquakes

The West Coast of the United States faces significant seismic risks due to its location on the Pacific Ring of Fire. Two major fault lines, the San Andreas in California and the Cascadia Subduction Zone in the Pacific Northwest, are considered overdue for catastrophic events.

Scientists report that stress levels along the San Andreas Fault are at their highest in 1,000 years. The Cascadia Subduction Zone has not experienced a major quake since 1700, which triggered a massive magnitude 9 earthquake and a tsunami. Experts emphasize that a major earthquake, often referred to as ‘the big one’, is an inevitability rather than a possibility.

Research by experts, including Yumei Wang of Portland State University, highlights critical vulnerabilities in infrastructure that could impede recovery efforts and increase casualties following a disaster. Key concerns include the safety of school buildings and the reliability of emergency services like 911.