Tonga earthquakes

M4.9 earthquake 108 km N of Hihifo, Tonga

A magnitude 4.9 earthquake struck 108 km N of Hihifo, Tonga on Wed, Aug 15, 2018, 4:14 PM GMT+13 (03:14 UTC), 33 km (20 mi) below the surface.

A larger quake followed: M5.1 126 km NE of Hihifo, Tonga. This one was a foreshock.

Apia forecastMore in Tonga

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
4.9 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-08-15 03:14:33 UTC
Depth
32.7 km (20.3 mi), shallow
Epicenter
14.986° S, 173.649° W
Region
Tonga
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.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 9.1 km horizontally, 4.4 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
118°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 9 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.6134 km NNE of Hihifo, Tonga · 2966 days ago · 10 km deep · 34 km away
  2. 5.1126 km NE of Hihifo, Tonga · 2965 days ago · 10 km deep · 63 km away
  3. 4.6102 km NNE of Hihifo, Tonga · 2964 days ago · 19 km deep · 23 km away
  4. 4.6111 km ENE of Hihifo, Tonga · 2962 days ago · 10 km deep · 91 km away
  5. 4.8123 km NE of Hihifo, Tonga · 2959 days ago · 10 km deep · 77 km away
  6. 4.9144 km NE of Hihifo, Tonga · 2949 days ago · 10 km deep · 79 km away
  7. 4.767 km N of Hihifo, Tonga · 2947 days ago · 82 km deep · 44 km away
  8. 4.3100 km NNW of Hihifo, Tonga · 2939 days ago · 153 km deep · 62 km away
  9. 4.397 km NE of Hihifo, Tonga · 2939 days ago · 10 km deep · 53 km away

Before

  1. 4.393 km N of Hihifo, Tonga · 2977 days ago · 35 km deep · 36 km away
  2. 4.690 km NE of Hihifo, Tonga · 2985 days ago · 35 km deep · 76 km away
  3. 4.623 km NNW of Hihifo, Tonga · 2995 days ago · 60 km deep · 88 km away
  4. 4.8136 km NE of Hihifo, Tonga · 2998 days ago · 10 km deep · 88 km away

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000g9g3. Read Sat, Oct 3, 2026, 5:23 PM UTC.