International Disaster and Emergency Monitoring Center

Preliminary earthquake data and analysis

Earthquake Report
Base data
Event ID 1351988
Event time 2025-04-23 00:28:44 (UTC)
Local time 2025-04-22 11:28:44 - [It was morning in the affected area.]
Last update 2025-04-23 01:27:47 (UTC)
Magnitude 5.1
Depth 10 km
Class Moderate
Hypocenter Shallow depth
Mercalli scale 5
Possible effects Almost everyone feels movement. Sleeping people are awakened. Doors swing open or close. Dishes are broken. Pictures on the wall move. Small objects move or are turned over. Trees might shake. Liquids might spill out of open containers.
Data status confirmed
Data provider AuGOV

Location
Continent Pacific Ocean - East
Country Tonga
Administration area Vava`u
Nearest settlement Vaimalo
Distance 283 km
Course WNW
Surface type underwater quake
Tsunami region South Pacific
Water surface name South Pacific Ocean

Overview map
Red circle 750 km, Orange circle 100 km, Yellow circle 150 km

Population map
Red circle 750 km, Orange circle 100 km, Yellow circle 150 km

Risk Analisys
Nearest nuclear power plants
There is no known nuclear power plant nearby.
Nearest marine ports
There is no known marine port nearby.
Nearest airports
There is no known marine port nearby.
Nearest volcanoes
There is no known volcanoes nearby.
Quick Analysis
According to the epicenter of the quake, this is an underwater quake. Based on the hypocenter, an underwater landslide is conceivable and could trigger a tsunami. Based on the data received, using the depth of the hypocenter, a potential tsunami will reach the nearest (Vaimalo, Vava`u, Tonga) settlement within 07:51. (PLEASE NOTE: THIS IS AN ESTIMATE ONLY!)