Major earthquake
M7.6 Earthquake — 55 km SW of Sitka, Alaska
1972-07-30 21:45 UTC · 56.67°, -135.92°
A magnitude 7.6 (major) earthquake struck 55 km SW of Sitka, Alaska on 1972-07-30 21:45 UTC, at a depth of 20 km. See it live on Earth Live's real-time 3D globe.
M7.6
Magnitude
20 km
Depth
3.8M t
TNT equivalent
VII
Max intensity (MMI)
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.
This area's earthquake history
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:
- M7.8 — 22 km W of Elfin Cove, Alaska · 1958-07-10
- M7.5 — 110 km SW of Edna Bay, Alaska · 2013-01-05
- M7.2 — 31 km SSW of Pelican, Alaska · 1927-10-24
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