M4.2 earthquake 9 km SSE of Copala, Mexico
A magnitude 4.2 earthquake struck 9 km SSE of Copala, Mexico on Fri, Apr 22, 1983, 9:51 PM CST (03:51 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 5 km NE of Pochotillo, Mexico. 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 (mb), light
- Local time
- UTC
- 1983-04-23 03:51:17 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.532° N, 98.947° W
- Region
- Mexico
- 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 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.431 km SSW of Copala, Mexico · 15866 days ago · 33 km deep · 27 km away
- 4.95 km NE of Pochotillo, Mexico · 15833 days ago · 33 km deep · 74 km away
- 4.54 km NNE of Tutepec, Mexico · 15827 days ago · 33 km deep · 51 km away
- 3.811 km SW of Barra de Tecoanapa, Mexico · 15814 days ago · 33 km deep · 19 km away
Before
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001upr. Read Wed, Sep 30, 2026, 9:21 PM UTC.