M4.8 earthquake 29 km NW of Ilo, Peru
A magnitude 4.8 earthquake struck 29 km NW of Ilo, Peru on Sun, Jul 31, 1977, 10:09 PM GMT-5 (03:09 UTC), 72 km (45 mi) below the surface.
A larger quake followed: M5.0 19 km S of Pacocha, Peru. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1977-08-01 03:09:32 UTC
- Depth
- 72.0 km (44.7 mi), intermediate-depth
- Epicenter
- 17.483° S, 71.570° W
- Region
- Peru
- 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.
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayPeru earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000py9. Read Mon, Sep 21, 2026, 11:34 PM UTC.