7.5mw
Tangshan Earthquake
Sensitivity zones:
strong — up to 106.9 km
moderate — up to 267.3 km
weak — up to 594.1 km
About this earthquake
The deadliest earthquake of the 20th century. The night-time shock struck directly beneath Tangshan, an industrial city of a million people with no seismic-resistant construction — the city was levelled within a minute. The official death toll is 242,000; independent estimates reach 655,000.
Sensitivity zones
Approximate radii, derived from magnitude and hypocentre depth, within which shaking is typically felt:
- strong — up to 106.9 km
- moderate — up to 267.3 km
- weak — up to 594.1 km
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