Major earthquake
M7.7 Earthquake — Mariana Islands region
1940-12-28 16:37 UTC · 18.20°, 147.46°
A magnitude 7.7 (major) earthquake struck Mariana Islands region on 1940-12-28 16:37 UTC, at a depth of 15 km. See it live on Earth Live's real-time 3D globe.
M7.7
Magnitude
15 km
Depth
5.4M t
TNT equivalent
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 1 earthquake of magnitude 2.5 or more within 300 km.
Strongest recorded within 300 km since 1900:
- M7.7 — Pagan region, Northern Mariana Islands · 2016-07-29
- M7.5 — Mariana Islands region · 1940-01-17
- M7.5 — Northern Mariana Islands · 1902-09-22
More recent earthquakes
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- M5.0 — 187 km ENE of Saipan, Northern Mariana Islands
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- M4.8 — 191 km ESE of Sarangani, Philippines
- M5.0 — 71 km E of ‘Ohonua, Tonga
- M4.5 — Kuril Islands
- M5.3 — central Mid-Atlantic Ridge
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