Samoa earthquakes

M4.2 earthquake 162 km SSW of Lotofag?, Samoa

A magnitude 4.2 earthquake struck 162 km SSW of Lotofag?, Samoa on Wed, Jul 26, 2017, 12:55 AM GMT+13 (11:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 137 km SW of Gataivai, Samoa. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-07-25 11:55:08 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.341° S, 172.405° W
Region
Samoa
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 6.7 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.16
Depth from
Operator assigned
Station coverage gap
125°
Stations used
18

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.4142 km NE of Hihifo, Tonga · 3354 days ago · 10 km deep · 60 km away
  2. 4.587 km NE of Hihifo, Tonga · 3352 days ago · 10 km deep · 80 km away
  3. 5.7137 km SW of Gataivai, Samoa · 3336 days ago · 8 km deep · 97 km away
  4. 4.679 km NE of Hihifo, Tonga · 3335 days ago · 10 km deep · 93 km away
  5. 4.5114 km NE of Hihifo, Tonga · 3331 days ago · 10 km deep · 78 km away
  6. 5.3151 km SW of Vailoatai, American Samoa · 3329 days ago · 10 km deep · 90 km away · felt by 3
  7. 4.5122 km E of Hihifo, Tonga · 3322 days ago · 10 km deep · 57 km away
  8. 5.0157 km SSW of Lotofag?, Samoa · 3311 days ago · 10 km deep · 8 km away
  9. 4.7132 km ENE of Hihifo, Tonga · 3305 days ago · 10 km deep · 36 km away

Before

  1. 4.187 km NE of Hihifo, Tonga · 3371 days ago · 127 km deep · 95 km away
  2. 4.5117 km NE of Hihifo, Tonga · 3379 days ago · 35 km deep · 80 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000a286. Read Fri, Oct 2, 2026, 7:14 PM UTC.