M4.7 earthquake 23 km SE of Tacna, Peru
A magnitude 4.7 earthquake struck 23 km SE of Tacna, Peru on Wed, Sep 20, 2017, 12:51 PM GMT-5 (17:51 UTC), 98 km (61 mi) below the surface.
A larger quake followed: M6.3 58 km E of Arica, Chile. 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 (mwr), light
- Local time
- UTC
- 2017-09-20 17:51:41 UTC
- Depth
- 97.5 km (60.6 mi), intermediate-depth
- Epicenter
- 18.142° S, 70.072° W
- Region
- Peru
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 7.4 km horizontally, 5.8 km in depth
- Depth from
- From location
- Station coverage gap
- 94°
- Stations used
- 67
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
- 3.977 km ESE of Palca, Peru · 3294 days ago · 147 km deep · 85 km away
- 6.358 km E of Arica, Chile · 3278 days ago · 85 km deep · 58 km away · felt by 82
- 4.459 km ESE of Arica, Chile · 3278 days ago · 91 km deep · 61 km away
- 4.856 km ESE of Arica, Chile · 3278 days ago · 94 km deep · 58 km away
- 4.147 km ESE of Arica, Chile · 3275 days ago · 102 km deep · 56 km away
- 3.938 km ESE of Arica, Chile · 3272 days ago · 89 km deep · 54 km away
- 4.312 km E of Palca, Peru · 3240 days ago · 153 km deep · 49 km away
- 4.215 km ESE of Estique, Peru · 3239 days ago · 156 km deep · 63 km away
Before
Earthquakes todayPeru earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000arz3. Read Wed, Sep 30, 2026, 10:18 PM UTC.