M4.2 earthquake 4 km ESE of Constitución, Chile
A magnitude 4.2 earthquake struck 4 km ESE of Constitución, Chile on Tue, Feb 23, 2021, 1:25 AM GMT-3 (04:25 UTC), 35 km (22 mi) below the surface.
A larger quake followed: M4.7 42 km WSW of Santa Cruz, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-02-23 04:25:52 UTC
- Depth
- 35.0 km (21.7 mi), shallow
- Epicenter
- 35.353° S, 72.366° W
- Region
- Chile
- Felt reports
- 4
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
4 people reported to the USGS what they felt; the strongest reported shaking was V, moderate shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique reverse
- Moment magnitude
- 4.2 Mwr
- Nodal plane 1
- Strike 179°, dip 71°, rake 59°
- Nodal plane 2
- Strike 60°, dip 36°, rake 145°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.6 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 80°
- Stations used
- 66
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000dkb8. Read Sun, Oct 4, 2026, 3:27 AM UTC.