M4.4 earthquake 51 km W of Illapel, Chile
A magnitude 4.4 earthquake struck 51 km W of Illapel, Chile on Mon, Apr 2, 2018, 7:37 PM GMT-3 (22:37 UTC), 30 km (18 mi) below the surface.
A larger quake followed: M6.2 56 km SW of Ovalle, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mwr), light
- Local time
- UTC
- 2018-04-02 22:37:12 UTC
- Depth
- 29.7 km (18.5 mi), shallow
- Epicenter
- 31.636° S, 71.713° W
- Region
- Chile
- Felt reports
- 7
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
7 people reported to the USGS what they felt; the strongest reported shaking was V, moderate 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
- 4.4 Mwr
- Nodal plane 1
- Strike 10°, dip 43°, rake 118°
- Nodal plane 2
- Strike 153°, dip 53°, rake 67°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 2.7 km horizontally, 5.3 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 77°
- Stations used
- 75
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.083 km WSW of Ovalle, Chile · 3096 days ago · 10 km deep · 94 km away
- 6.256 km SW of Ovalle, Chile · 3091 days ago · 66 km deep · 70 km away · felt by 389
- 4.450 km WSW of Illapel, Chile · 3088 days ago · 40 km deep · 14 km away · felt by 2
- 4.738 km NW of La Ligua, Chile · 3053 days ago · 32 km deep · 65 km away · felt by 110
- 4.641 km WNW of Illapel, Chile · 3044 days ago · 41 km deep · 28 km away · felt by 1
Before
- 3.861 km WNW of La Ligua, Chile · 3123 days ago · 29 km deep · 58 km away · felt by 3
- 4.493 km WSW of Illapel, Chile · 3123 days ago · 40 km deep · 45 km away · felt by 21
- 4.732 km S of Ovalle, Chile · 3128 days ago · 60 km deep · 93 km away
- 4.357 km SSW of Ovalle, Chile · 3128 days ago · 60 km deep · 68 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000dcqi. Read Sat, Sep 26, 2026, 6:23 PM UTC.