Stuff You Should Know

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Alaska Earthquake of 1964

Explore episode Jul 2, 2026
History
The Nuclear Arms Race Built Modern Seismology

Alaska Earthquake of 1964 · Jul 2, 2026 History

The proliferation of seismographs across Alaska and the American West wasn't driven by earthquake science — it was driven by the Cold War nuclear arms race. Governments deployed seismographs to detect secret nuclear tests abroad, and only later redirected that monitoring infrastructure toward earthquakes.

Where this was said

Building Codes, Seismographs, and the Safety Legacy

At 30:32 · chapter starts 29:05

The 1964 earthquake didn't just advance theoretical science — it drove sweeping practical changes. Alaska adopted strict new building codes, particularly for large structures, placing it alongside California as having the most rigorous earthquake construction standards in the US. The payoff came in 2018, when a 7.0 quake struck Anchorage. Buildings held. Roads crumbled, 117 people were injured, and $76 million in damages accrued — but nobody died. That outcome would have been unthinkable in 1964. The monitoring infrastructure underwent an equally dramatic transformation. At the time of the earthquake, Alaska had just 2 seismograph stations, the oldest installed 60 years prior. Within a decade there were 90; by the mid-2000s, 197 stations covered Alaska and Western Canada. Josh reveals an unexpected source of this infrastructure boom: the Cold War nuclear arms race. Governments had deployed seismographs to detect secret foreign nuclear tests, and only later repurposed the networks for earthquake monitoring. The combination of better buildings and better monitoring produced the National Seismic Hazard Map — a comprehensive tool that tells planners exactly where to build and where not to, born directly from the science the 1964 earthquake ignited.

Science
Strict Building Codes Saved Lives in 2018

Alaska Earthquake of 1964 · Jul 2, 2026 Science

A 7.0 earthquake struck Anchorage in 2018 — powerful enough to cause $76 million in damage and injure 117 people — but killed no one. That's the direct result of Alaska adopting some of the strictest building codes in the US following the 1964 disaster.

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