M3.7 earthquake 45 km W of Valparaíso, Chile
A magnitude 3.7 earthquake struck 45 km W of Valparaíso, Chile on Sat, Jul 21, 2018, 10:18 PM GMT-4 (02:18 UTC), 22 km (14 mi) below the surface.
A larger quake followed: M4.5 36 km WSW 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
- 3.7 (mb), minor
- Local time
- UTC
- 2018-07-22 02:18:27 UTC
- Depth
- 22.2 km (13.8 mi), shallow
- Epicenter
- 32.992° S, 72.109° W
- Region
- Chile
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.5 km horizontally, 3.8 km in depth
- Magnitude uncertainty
- ±0.29
- Depth from
- From location
- Station coverage gap
- 182°, poorly surrounded by stations
- Stations used
- 45
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.366 km NNW of Valparaíso, Chile · 2982 days ago · 16 km deep · 57 km away
- 4.285 km W of San Antonio, Chile · 2977 days ago · 10 km deep · 81 km away
- 3.122 km NW of Valparaíso, Chile · 2965 days ago · 28 km deep · 35 km away · felt by 3
- 4.349 km WNW of La Ligua, Chile · 2962 days ago · 53 km deep · 93 km away · felt by 1
- 4.447 km W of Valparaíso, Chile · 2955 days ago · 18 km deep · 12 km away · felt by 3
- 4.536 km WSW of La Ligua, Chile · 2935 days ago · 32 km deep · 69 km away · felt by 6
- 4.137 km WSW of La Ligua, Chile · 2935 days ago · 21 km deep · 67 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000gb0a. Read Sun, Sep 27, 2026, 10:22 AM UTC.