M4.1 earthquake 4 km S of Petacalco, Mexico
A magnitude 4.1 earthquake struck 4 km S of Petacalco, Mexico on Sun, Oct 25, 1981, 7:48 AM CST (13:48 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 10 km N of La Unión, Mexico. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb), light
- Local time
- UTC
- 1981-10-25 13:48:43 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 17.943° N, 102.102° 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: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 3.912 km SW of Tumbiscatío de Ruiz, Mexico · 16401 days ago · 33 km deep · 70 km away
- 5.110 km N of La Unión, Mexico · 16396 days ago · 60 km deep · 33 km away
- 3.585 km S of Playa Azul, Mexico · 16375 days ago · 33 km deep · 89 km away
- 4.315 km WSW of Vallecitos de Zaragoza, Mexico · 16356 days ago · 91 km deep · 70 km away
- 4.717 km ESE of La Mira Tumbiscatio, Mexico · 16355 days ago · 104 km deep · 74 km away
- 4.079 km SW of Playa Azul, Mexico · 16345 days ago · 85 km deep · 96 km away
Before
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001gp1. Read Tue, Sep 22, 2026, 4:03 PM UTC.