M4.4 earthquake 16 km NNE of Tonalá, Mexico
A magnitude 4.4 earthquake struck 16 km NNE of Tonalá, Mexico on Thu, Aug 4, 1983, 8:26 PM CST (02:26 UTC), 95 km (59 mi) below the surface.
A larger quake followed: M6.3 4 km WNW of San Pedro Buenavista, Mexico. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1983-08-05 02:26:49 UTC
- Depth
- 95.4 km (59.3 mi), intermediate-depth
- Epicenter
- 16.227° N, 93.693° 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.72 km NW of Ignacio Ramírez, Mexico · 15766 days ago · 87 km deep · 23 km away
- 6.34 km WNW of San Pedro Buenavista, Mexico · 15725 days ago · 115 km deep · 59 km away
- 5.110 km N of Francisco I. Madero, Mexico · 15722 days ago · 146 km deep · 75 km away
Before
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001xbp. Read Sun, Oct 4, 2026, 4:22 PM UTC.