M4.7 earthquake 39 km W of San Antonio, Chile
A magnitude 4.7 earthquake struck 39 km W of San Antonio, Chile on Fri, Mar 16, 2012, 8:31 PM GMT-3 (23:31 UTC), 46 km (29 mi) below the surface.
A larger quake followed: M5.0 110 km WSW of San Antonio, 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 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2012-03-16 23:31:54 UTC
- Depth
- 46.2 km (28.7 mi), shallow
- Epicenter
- 33.606° S, 72.038° W
- Region
- Chile
- Felt reports
- 19
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 4.7 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · 21 stations |
| 5.07 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
What happened
The USGS’s account of the effects of this earthquake.
Felt (III) at Navidad, San Antonio, Santo Domingo, Valparaiso and Vina del Mar; (II) at Pelarco, Pichilemu, Quillota and Santiago. Also felt at San Bernardo.
From the USGS event page for usp000jgc5. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
19 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.
How well it is located
Reviewed by a seismologist.
- Station coverage gap
- 103°
- Stations used
- 59
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.071 km W of Cartagena, Chile · 5313 days ago · 21 km deep · 34 km away
- 5.0110 km WSW of San Antonio, Chile · 5296 days ago · 32 km deep · 72 km away · felt by 8
- 4.181 km WSW of San Antonio, Chile · 5281 days ago · 11 km deep · 52 km away
- 4.327 km WNW of Valparaíso, Chile · 5257 days ago · 13 km deep · 80 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000jgc5 (also filed as usb0008irz, iscgem600791301). Read Fri, Oct 2, 2026, 2:06 PM UTC.