M4.7 Earthquake 283 km WNW of Houma, Tonga — April 15, 2026
2026-04-15 17:09:18 UTC (3 days ago)
On April 15, 2026 at 17:09 UTC, a magnitude 4.7 deep-focus earthquake struck 283 km WNW of Houma, Tonga, at a depth of 545.7 km and coordinates -20.4537°, -177.9157°. This earthquake was detected by 88 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
The epicenter is located in Tonga, a region characterized by the Tonga-Kermadec subduction zone, where the Pacific Plate descends at up to 240 mm per year — the fastest plate convergence on Earth. The nearest mapped fault system is the Tonga Trench. View all earthquakes in Tonga.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
-177.9157°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Houma, Tonga?
The magnitude 4.7 earthquake that struck 283 km WNW of Houma, Tonga on April 15, 2026 at 17:09 UTC had a depth of 545.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -20.4537°, -177.9157°, which is 283 km WNW of Houma, Tonga. View all earthquakes in Tonga.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Has Tonga had earthquakes this big before?
The largest recorded earthquake in Tonga was the M8.1 Tonga Trench earthquake of June 26, 1917. Today's magnitude 4.7 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.