M4.2 earthquake 46 km NNW of Valparaíso, Chile
A magnitude 4.2 earthquake struck 46 km NNW of Valparaíso, Chile on Thu, Jan 4, 2018, 3:01 AM GMT-3 (06:01 UTC), 31 km (19 mi) below the surface.
A larger quake followed: M4.4 74 km WNW of La Ligua, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-01-04 06:01:26 UTC
- Depth
- 31.0 km (19.3 mi), shallow
- Epicenter
- 32.638° S, 71.772° W
- Region
- Chile
- Felt reports
- 44
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
44 people reported to the USGS what they felt; the strongest reported shaking was VI, strong shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Moment magnitude
- 4.2 Mwr
- Nodal plane 1
- Strike 16°, dip 39°, rake 119°
- Nodal plane 2
- Strike 161°, dip 57°, rake 69°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.5 km horizontally, 5.2 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 82°
- Stations used
- 54
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.474 km WNW of La Ligua, Chile · 3170 days ago · 11 km deep · 43 km away
- 4.453 km W of Valparaíso, Chile · 3143 days ago · 11 km deep · 64 km away
Before
- 4.474 km WSW of Illapel, Chile · 3197 days ago · 14 km deep · 72 km away
- 4.453 km W of La Ligua, Chile · 3208 days ago · 25 km deep · 14 km away
- 4.033 km WNW of La Ligua, Chile · 3221 days ago · 10 km deep · 43 km away
- 4.637 km NNW of La Ligua, Chile · 3222 days ago · 54 km deep · 60 km away · felt by 18
- 4.367 km WNW of La Ligua, Chile · 3222 days ago · 22 km deep · 57 km away · felt by 2
- 4.372 km NW of La Ligua, Chile · 3222 days ago · 36 km deep · 70 km away
- 4.557 km WSW of Valparaíso, Chile · 3223 days ago · 15 km deep · 75 km away · felt by 9
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000c0kz. Read Fri, Oct 2, 2026, 4:23 PM UTC.