Samoa earthquakes

M4.4 earthquake 155 km SSW of Lotofag?, Samoa

A magnitude 4.4 earthquake struck 155 km SSW of Lotofag?, Samoa on Sun, Jul 19, 2020, 7:44 AM GMT+13 (18:44 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.4 123 km NE of Hihifo, Tonga. 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
4.4 (mb), light
Local time
UTC
2020-07-18 18:44:58 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.227° S, 172.507° 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 6.5 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
122°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.3140 km NE of Hihifo, Tonga · 2265 days ago · 16 km deep · 24 km away
  2. 4.4112 km NE of Hihifo, Tonga · 2262 days ago · 10 km deep · 76 km away
  3. 4.6113 km NE of Hihifo, Tonga · 2261 days ago · 10 km deep · 63 km away
  4. 4.2138 km ENE of Hihifo, Tonga · 2257 days ago · 10 km deep · 22 km away
  5. 4.6111 km NE of Hihifo, Tonga · 2252 days ago · 10 km deep · 69 km away
  6. 4.3135 km NNE of Hihifo, Tonga · 2250 days ago · 10 km deep · 78 km away
  7. 4.4115 km NE of Hihifo, Tonga · 2243 days ago · 10 km deep · 65 km away
  8. 4.4110 km NNE of Hihifo, Tonga · 2242 days ago · 10 km deep · 80 km away
  9. 4.6126 km NNE of Hihifo, Tonga · 2239 days ago · 10 km deep · 77 km away · felt by 1
  10. 4.8111 km NE of Hihifo, Tonga · 2238 days ago · 10 km deep · 71 km away
  11. 4.181 km NE of Hihifo, Tonga · 2216 days ago · 10 km deep · 92 km away
  12. 5.4123 km NE of Hihifo, Tonga · 2214 days ago · 25 km deep · 51 km away · felt by 2
  13. 4.7109 km NE of Hihifo, Tonga · 2207 days ago · 10 km deep · 54 km away

Before

  1. 4.9129 km NE of Hihifo, Tonga · 2265 days ago · 10 km deep · 49 km away
  2. 6.1141 km ENE of Hihifo, Tonga · 2265 days ago · 12 km deep · 20 km away · felt by 1 · tsunami flag
  3. 4.5143 km NE of Hihifo, Tonga · 2270 days ago · 10 km deep · 52 km away
  4. 4.593 km ENE of Hihifo, Tonga · 2275 days ago · 10 km deep · 67 km away
  5. 4.0133 km ENE of Hihifo, Tonga · 2276 days ago · 10 km deep · 27 km away
  6. 4.8119 km NNE of Hihifo, Tonga · 2276 days ago · 10 km deep · 96 km away
  7. 4.6118 km NE of Hihifo, Tonga · 2278 days ago · 10 km deep · 63 km away
  8. 4.9202 km E of Hihifo, Tonga · 2285 days ago · 10 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b3dl. Read Wed, Sep 30, 2026, 10:19 PM UTC.