M4.7 earthquake 29 km SE of Palca, Peru
A magnitude 4.7 earthquake struck 29 km SE of Palca, Peru on Mon, Oct 22, 1973, 1:15 AM GMT-5 (06:15 UTC), 105 km (65 mi) below the surface.
A larger quake followed: M5.0 12 km WSW of Las Yaras, 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 (mb), light
- Local time
- UTC
- 1973-10-22 06:15:23 UTC
- Depth
- 105.0 km (65.2 mi), intermediate-depth
- Epicenter
- 17.991° S, 69.804° 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
- 40
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 5.012 km WSW of Las Yaras, Peru · 19316 days ago · 89 km deep · 93 km away
- 5.2Peru-Bolivia border region · 19288 days ago · 142 km deep · 31 km away
Before
Earthquakes todayPeru earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003wc. Read Tue, Sep 22, 2026, 9:05 AM UTC.