A magnitude 6.5 (strong) earthquake struck 15 km S of Rampart, Alaska on 1968-10-29 22:16 UTC, at a depth of 10 km. See it live on Earth Live's real-time 3D globe.
Source: USGS event page. The TNT equivalent is computed from the magnitude with the standard Gutenberg–Richter energy relation; all other figures are USGS's own.
In the year before this quake, USGS recorded 0 earthquakes of magnitude 2.5 or more within 300 km.
Strongest recorded within 300 km since 1900:
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