M3.9 earthquake 20 km SW of Aguililla, Mexico
A magnitude 3.9 earthquake struck 20 km SW of Aguililla, Mexico on Fri, Sep 20, 1985, 4:54 AM CST (10:54 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 33 km W of El Habillal, Mexico. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1985-09-20 10:54:54 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 18.633° N, 102.951° 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: 7 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.933 km W of El Habillal, Mexico · 14977 days ago · 33 km deep · 69 km away
- 4.155 km S of La Placita de Morelos, Mexico · 14975 days ago · 33 km deep · 90 km away
- 3.872 km SE of La Placita de Morelos, Mexico · 14974 days ago · 33 km deep · 76 km away
- 5.744 km WNW of El Habillal, Mexico · 14973 days ago · 30 km deep · 52 km away
- 4.855 km SSW of Aguililla, Mexico · 14953 days ago · 33 km deep · 39 km away
- 5.924 km NW of El Habillal, Mexico · 14938 days ago · 39 km deep · 68 km away
- 4.15 km S of Cerro de Ortega, Mexico · 14924 days ago · 33 km deep · 82 km away
Before
- 4.425 km SSE of Coalcomán de Vázquez Pallares, Mexico · 14978 days ago · 33 km deep · 16 km away
- 4.237 km SW of Tumbiscatío de Ruiz, Mexico · 14978 days ago · 33 km deep · 45 km away
- 4.048 km WNW of El Habillal, Mexico · 14978 days ago · 33 km deep · 49 km away
- 4.86 km SW of El Habillal, Mexico · 14978 days ago · 33 km deep · 94 km away
- 8.01985 Michoacan, Mexico Earthquake · 14978 days ago · 28 km deep · 66 km away
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002jy2. Read Tue, Sep 22, 2026, 8:45 PM UTC.