M4.9 Depth: 35.0 km

M4.9 Earthquake near 56 km NNW of Houma, Tonga (Tonga)

UTC time: 2025-08-10 16:36:08 UTC Local time: —

About this earthquake

On August 10, 2025 at 16:36 UTC, a magnitude M4.9 earthquake occurred near 56 km NNW of Houma, Tonga (Tonga). The hypocenter lay relatively close to the surface at around 35 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by USGS and cross-checked across seismological networks.

Details

Magnitude

M4.9

Depth

35.0 km

UTC time

2025-08-10 16:36:08 UTC

Local time

—

Country

Tonga

City

Haʻapai

Source

usgs

Coordinates

-20.69000, -175.48470

Temperature

21.6°C

Map

Depth profile

Shallow

35 km

35 km — shallower than the regional average (86.9 km)

Regional average: 86.9 km

Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

Hunga Tonga-Hunga Ha'apai

Distance: 18 km ·Caldera ·Elevation: 114 m ·Last eruption: 2022 ·Tonga
Tofua Arc at 20.9°S

Distance: 19 km ·Stratovolcano ·Elevation: -296 m ·Last eruption: 2017 ·Tonga
Fonuafo'ou

Distance: 42 km ·Stratovolcano ·Elevation: -17 m ·Last eruption: 1936 ·Tonga
Tofua Arc at 21.1°S

Distance: 58 km ·Stratovolcano ·Elevation: -65 m ·Tonga
Tofua Arc at 21.3°S

Distance: 74 km ·Stratovolcano ·Elevation: -68 m ·Last eruption: 1932 ·Tonga
Tofua

Distance: 113 km ·Caldera ·Elevation: 515 m ·Last eruption: 2026 ·Tonga

Historic earthquake map · Tonga

Open history map

Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · Tonga

Country overview

View earthquake KPIs, strongest and latest events, and averages for this country.

Stats (last 24h)

Global (24h)

613

Country (24h)