M7.7 earthquake 30 km NNE of Constitución, Chile
A magnitude 7.7 earthquake struck 30 km NNE of Constitución, Chile on Sat, Dec 1, 1928, 12:06 AM GMT-4 (04:06 UTC), 35 km (22 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 7.7 (mw), major
- Local time
- UTC
- 1928-12-01 04:06:17 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 35.084° S, 72.267° W
- Region
- Chile
- Strongest shaking
- VII, very strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VII, very strong shaking
- Peak ground acceleration
- 34.1% of gravity
- Peak ground velocity
- 3.4 cm/s
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Magnitude uncertainty
- ±0.40
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 6.213 km S of Constitución, Chile · 35722 days ago · 35 km deep · 44 km away
- 7.247 km NW of Cauquenes, Chile · 35722 days ago · 30 km deep · 82 km away
- 5.534 km NW of Constitución, Chile · 35721 days ago · 35 km deep · 42 km away
- 5.331 km NE of Constitución, Chile · 35721 days ago · 35 km deep · 7 km away
- 5.510 km NNE of Cauquenes, Chile · 35715 days ago · 35 km deep · 88 km away
- 5.722 km WNW of Talca, Chile · 35704 days ago · 35 km deep · 47 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem908986. Read Sun, Sep 20, 2026, 11:12 PM UTC.