M4.0 earthquake 45 km W of Valparaíso, Chile
A magnitude 4.0 earthquake struck 45 km W of Valparaíso, Chile on Sat, Oct 7, 2017, 9:03 PM GMT-3 (00:03 UTC), 16 km (10 mi) below the surface.
A larger quake followed: M4.5 57 km WSW of Valparaíso, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mwr), light
- Local time
- UTC
- 2017-10-08 00:03:30 UTC
- Depth
- 15.6 km (9.7 mi), shallow
- Epicenter
- 32.987° S, 72.115° W
- Region
- Chile
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique reverse
- Moment magnitude
- 4.0 Mwr
- Nodal plane 1
- Strike 44°, dip 31°, rake 137°
- Nodal plane 2
- Strike 173°, dip 69°, rake 67°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.4 km horizontally, 4.6 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 155°
- Stations used
- 53
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 3.710 km SSW of Valparaíso, Chile · 3272 days ago · 30 km deep · 44 km away · felt by 42
- 4.056 km W of Valparaíso, Chile · 3270 days ago · 20 km deep · 13 km away · felt by 29
- 4.242 km WNW of Hacienda La Calera, Chile · 3227 days ago · 30 km deep · 59 km away · felt by 30
- 4.242 km NNW of Valparaíso, Chile · 3222 days ago · 22 km deep · 42 km away · felt by 36
- 4.470 km WNW of La Ligua, Chile · 3219 days ago · 10 km deep · 78 km away · felt by 3
- 4.357 km WNW of La Ligua, Chile · 3219 days ago · 26 km deep · 81 km away
- 4.557 km WSW of Valparaíso, Chile · 3217 days ago · 15 km deep · 25 km away · felt by 9
- 4.367 km WNW of La Ligua, Chile · 3216 days ago · 22 km deep · 99 km away · felt by 2
Before
- 4.161 km W of La Ligua, Chile · 3276 days ago · 20 km deep · 59 km away · felt by 103
- 4.035 km W of Valparaíso, Chile · 3281 days ago · 19 km deep · 11 km away · felt by 34
- 4.351 km NW of Valparaíso, Chile · 3288 days ago · 24 km deep · 36 km away · felt by 45
- 4.916 km S of San Antonio, Chile · 3290 days ago · 46 km deep · 97 km away · felt by 195
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000b2ni. Read Sat, Sep 26, 2026, 8:36 PM UTC.