M 4.5 earthquake – 2 km N of Cornwall, Pennsylvania

May 12, 1964 · 06:45 UTC · May 12, 1964
Local time: May 12, 1964 · 02:45 (UTC-4)

LightShallow · 1.0 km Reviewed by a seismologist

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Magnitude: 4.5body-wave magnitude (mb)
Depth: 1.0 kmShallow earthquake
Epicenter: 40.298, -76.4115.0 km from Lebanon
Energy released: 85 tons of TNTless than one Hiroshima bomb
Felt reports: —"Did You Feel It?" responses
Shaking intensity: 5.5max. instrumental (MMI)
Aftershocks: 0M2.5+ within 30 km
Significance: 312USGS score, 0–1,000+

The strongest here since 1918

The last earthquake at least as strong within 300 km struck on Apr 10, 1918.

How strong was it?

Light earthquake. It released 85 tons of TNT, 5.6 times less than a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.

Chile 1960 M 9.5

Japan 2011 M 9.1

San Francisco 1906 M 7.9

Turkey 2023 M 7.8

Haiti 2010 M 7.0

Northridge 1994 M 6.7

This earthquake M 4.5

The strongest earthquakes within 300 km

Since 1900, around United States.