M3.7 earthquake 50 km WNW of Cartagena, Chile
A magnitude 3.7 earthquake struck 50 km WNW of Cartagena, Chile on Fri, Apr 28, 2017, 2:38 PM GMT-3 (17:38 UTC), 20 km (13 mi) below the surface.
A larger quake followed: M5.3 40 km SW 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
- 3.7 (Mwr, regional moment), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-04-28 17:38:08 UTC
- Depth
- 20.1 km (12.5 mi), shallow
- Epicenter
- 33.308° S, 72.063° 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 I, not felt 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
- 3.7 Mwr
- Nodal plane 1
- Strike 28°, dip 12°, rake 103°
- Nodal plane 2
- Strike 195°, dip 78°, rake 87°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 2.5 km horizontally, 8.3 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 173°
- 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: 29 in the 60 days after this one and 126 in the 30 days before it.
After
- 4.551 km WSW of Valparaíso, Chile · 3444 days ago · 19 km deep · 11 km away · felt by 1
- 5.340 km SW of Valparaíso, Chile · 3444 days ago · 18 km deep · 10 km away · felt by 10
- 4.145 km WNW of Cartagena, Chile · 3444 days ago · 20 km deep · 5 km away · felt by 2
- 4.239 km SW of Valparaíso, Chile · 3444 days ago · 26 km deep · 12 km away · felt by 2
- 3.850 km WSW of Valparaíso, Chile · 3444 days ago · 23 km deep · 8 km away · felt by 1
- 4.138 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 12 km away · felt by 1
- 3.864 km WSW of Valparaíso, Chile · 3444 days ago · 21 km deep · 24 km away
- 4.439 km WNW of Cartagena, Chile · 3444 days ago · 20 km deep · 11 km away · felt by 1
- 4.444 km WSW of Valparaíso, Chile · 3444 days ago · 20 km deep · 9 km away · felt by 1
- 5.136 km WSW of Valparaíso, Chile · 3444 days ago · 19 km deep · 14 km away · felt by 25
- 3.817 km SW of Valparaíso, Chile · 3444 days ago · 22 km deep · 33 km away
- 3.948 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 8 km away · felt by 1
- 4.247 km WSW of Valparaíso, Chile · 3443 days ago · 21 km deep · 10 km away · felt by 2
- 4.251 km WSW of Valparaíso, Chile · 3443 days ago · 20 km deep · 12 km away
- 3.961 km W of Valparaíso, Chile · 3442 days ago · 16 km deep · 41 km away
- 4.154 km W of Valparaíso, Chile · 3441 days ago · 17 km deep · 35 km away · felt by 3
- 4.257 km W of Valparaíso, Chile · 3440 days ago · 13 km deep · 33 km away
- 4.460 km W of Valparaíso, Chile · 3439 days ago · 18 km deep · 33 km away · felt by 2
- 3.971 km W of Valparaíso, Chile · 3438 days ago · 8 km deep · 53 km away
- 3.9Off the coast of Valparaiso, Chile · 3433 days ago · 20 km deep · 54 km away
- 5.239 km WNW of Valparaíso, Chile · 3429 days ago · 15 km deep · 42 km away · felt by 12
- 4.311 km S of Valparaíso, Chile · 3428 days ago · 31 km deep · 43 km away · felt by 2
- 4.262 km W of Valparaíso, Chile · 3427 days ago · 13 km deep · 44 km away
- 4.273 km W of Valparaíso, Chile · 3425 days ago · 12 km deep · 46 km away · felt by 1
- 4.151 km WNW of Valparaíso, Chile · 3420 days ago · 16 km deep · 44 km away · felt by 1
- 3.949 km WNW of Valparaíso, Chile · 3413 days ago · 17 km deep · 42 km away · felt by 3
- 4.262 km W of Valparaíso, Chile · 3412 days ago · 18 km deep · 47 km away
- 4.558 km W of Valparaíso, Chile · 3401 days ago · 10 km deep · 33 km away · felt by 7
- 4.321 km W of Valparaíso, Chile · 3399 days ago · 26 km deep · 32 km away · felt by 15
Before
- 4.244 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 12 km away
- 4.651 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 14 km away · felt by 1
- 4.347 km WSW of Valparaíso, Chile · 3444 days ago · 20 km deep · 10 km away · felt by 1
- 4.639 km NW of Cartagena, Chile · 3444 days ago · 24 km deep · 12 km away · felt by 1
- 3.639 km WSW of Valparaíso, Chile · 3444 days ago · 23 km deep · 12 km away
- 4.660 km WSW of Valparaíso, Chile · 3444 days ago · 10 km deep · 19 km away · felt by 1
- 5.818 km WSW of Valparaíso, Chile · 3444 days ago · 27 km deep · 32 km away · felt by 52
- 5.444 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 9 km away · felt by 2
- 4.551 km WSW of Valparaíso, Chile · 3444 days ago · 20 km deep · 6 km away · felt by 1
- 5.147 km WSW of Valparaíso, Chile · 3444 days ago · 10 km deep · 8 km away · felt by 2
- 4.645 km WSW of Valparaíso, Chile · 3444 days ago · 21 km deep · 7 km away · felt by 1
- 4.338 km SW of Valparaíso, Chile · 3444 days ago · 23 km deep · 12 km away
- 4.636 km SW of Valparaíso, Chile · 3444 days ago · 22 km deep · 14 km away · felt by 1
- 4.740 km SW of Valparaíso, Chile · 3444 days ago · 24 km deep · 12 km away · felt by 1
- 5.937 km WSW of Valparaíso, Chile · 3444 days ago · 22 km deep · 13 km away · felt by 325
- 3.942 km SW of Valparaíso, Chile · 3445 days ago · 22 km deep · 8 km away · felt by 1
- 4.335 km WSW of Valparaíso, Chile · 3445 days ago · 29 km deep · 15 km away
- 4.738 km SW of Valparaíso, Chile · 3445 days ago · 20 km deep · 12 km away · felt by 11
- 4.142 km SW of Valparaíso, Chile · 3445 days ago · 24 km deep · 9 km away · felt by 1
- 5.139 km SW of Valparaíso, Chile · 3446 days ago · 23 km deep · 11 km away · felt by 57
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10008lnb. Read Fri, Oct 2, 2026, 4:43 PM UTC.