M4.7 earthquake 136 km NNW of Constitución, Chile
A magnitude 4.7 earthquake struck 136 km NNW of Constitución, Chile on Sat, May 18, 1985, 3:26 AM GMT-4 (07:26 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.6 71 km WSW of San Antonio, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1985-05-18 07:26:00 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 34.286° S, 73.203° W
- Region
- Chile
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.583 km WSW of San Antonio, Chile · 15101 days ago · 33 km deep · 83 km away
- 5.671 km WSW of San Antonio, Chile · 15101 days ago · 33 km deep · 95 km away
- 4.982 km WSW of San Antonio, Chile · 15101 days ago · 33 km deep · 84 km away
- 4.678 km WSW of San Antonio, Chile · 15101 days ago · 33 km deep · 89 km away
- 4.6107 km WSW of San Antonio, Chile · 15091 days ago · 33 km deep · 59 km away
- 3.990 km W of San Antonio, Chile · 15085 days ago · 33 km deep · 89 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002ey0. Read Tue, Sep 22, 2026, 2:33 PM UTC.