M5.5 earthquake 49 km WNW of Minas de Marcona, Peru
A magnitude 5.5 earthquake struck 49 km WNW of Minas de Marcona, Peru on Wed, Aug 14, 1985, 12:24 AM GMT-5 (05:24 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.7 55 km WNW of Minas de Marcona, Peru. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mw), moderate
- Local time
- UTC
- 1985-08-14 05:24:29 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 15.119° S, 75.565° W
- Region
- Peru
- Strongest shaking
- IV, light shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- IV, light shaking
- Peak ground acceleration
- 5.3% of gravity
- Peak ground velocity
- 0.8 cm/s
- Map
- Automatic
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 2.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.745 km WNW of Minas de Marcona, Peru · 15023 days ago · 33 km deep · 9 km away
- 4.460 km WSW of Changuillo, Peru · 15022 days ago · 33 km deep · 22 km away
- 5.755 km WNW of Minas de Marcona, Peru · 15018 days ago · 33 km deep · 9 km away
- 5.443 km WNW of Minas de Marcona, Peru · 15006 days ago · 78 km deep · 16 km away
Before
Earthquakes todayPeru earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002hqf (also filed as gcmtb081485b, gcmt19850814052429, iscgem518033). Read Wed, Sep 30, 2026, 9:09 PM UTC.