M4.7 earthquake 14 km S of Palca, Peru
A magnitude 4.7 earthquake struck 14 km S of Palca, Peru on Thu, Oct 18, 2018, 10:47 AM GMT-5 (15:47 UTC), 114 km (71 mi) below the surface.
A larger quake followed: M4.9 8 km E of Chuquitira, Peru. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (Mww, W-phase moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-10-18 15:47:53 UTC
- Depth
- 114.0 km (70.8 mi), intermediate-depth
- Epicenter
- 17.908° S, 69.987° W
- Region
- Peru
- Felt reports
- 4
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
4 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Normal
- Moment magnitude
- 4.7 Mww
- Nodal plane 1
- Strike 117°, dip 13°, rake -117°
- Nodal plane 2
- Strike 325°, dip 78°, rake -84°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.2 km horizontally, 4.9 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 105°
- Stations used
- 115
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 8 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.421 km NW of Arica, Chile · 2905 days ago · 66 km deep · 71 km away · felt by 1
- 4.98 km E of Chuquitira, Peru · 2897 days ago · 138 km deep · 70 km away · felt by 4
- 4.230 km SE of Tacna, Peru · 2890 days ago · 102 km deep · 36 km away
- 4.277 km ENE of Estique, Peru · 2888 days ago · 167 km deep · 92 km away
- 4.035 km WSW of Arica, Chile · 2884 days ago · 45 km deep · 100 km away
- 4.163 km E of Arica, Chile · 2878 days ago · 149 km deep · 60 km away · felt by 2
- 4.321 km ESE of Calana, Peru · 2850 days ago · 130 km deep · 14 km away
- 4.229 km NE of Palca, Peru · 2847 days ago · 10 km deep · 42 km away
Before
Earthquakes todayPeru earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000hdya. Read Thu, Oct 1, 2026, 10:08 PM UTC.