Tonga earthquakes

M4.7 earthquake Tonga

A magnitude 4.7 earthquake struck in Tonga on Tue, Sep 3, 2019, 2:20 PM GMT-12 (02:20 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.5 176 km NE of Neiafu, Tonga. This one was a foreshock.

More in Tonga

Map

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

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The earthquake

Magnitude
4.7 (mb), light
Local time
UTC
2019-09-04 02:20:08 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
17.808° S, 173.101° W
Region
Tonga
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 10.0 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.16
Depth from
Operator assigned
Station coverage gap
208°, poorly surrounded by stations
Stations used
15

Nearby

Within 100 km, magnitude 1.7 and up: 13 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.6183 km SE of Hihifo, Tonga · 2582 days ago · 10 km deep · 60 km away
  2. 5.4160 km ENE of Neiafu, Tonga · 2567 days ago · 10 km deep · 84 km away
  3. 5.1165 km ENE of Neiafu, Tonga · 2567 days ago · 10 km deep · 88 km away
  4. 4.5194 km ENE of Neiafu, Tonga · 2567 days ago · 10 km deep · 83 km away
  5. 4.5132 km ENE of Neiafu, Tonga · 2567 days ago · 10 km deep · 66 km away
  6. 4.7203 km ENE of Neiafu, Tonga · 2567 days ago · 10 km deep · 98 km away
  7. 5.2181 km NE of Neiafu, Tonga · 2562 days ago · 10 km deep · 50 km away
  8. 4.480 km N of Neiafu, Tonga · 2548 days ago · 160 km deep · 96 km away
  9. 4.4155 km SE of Hihifo, Tonga · 2543 days ago · 10 km deep · 88 km away
  10. 4.5202 km NE of Neiafu, Tonga · 2535 days ago · 10 km deep · 74 km away
  11. 5.5176 km NE of Neiafu, Tonga · 2533 days ago · 10 km deep · 47 km away
  12. 4.5187 km SE of Hihifo, Tonga · 2531 days ago · 10 km deep · 73 km away
  13. 5.2201 km ENE of Neiafu, Tonga · 2526 days ago · 10 km deep · 78 km away

Before

  1. 4.5139 km NE of Neiafu, Tonga · 2589 days ago · 10 km deep · 14 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70005eu0. Read Wed, Sep 30, 2026, 10:35 AM UTC.