Preliminary earthquake data and analysis
| Event ID | 1379238 |
|---|---|
| Event time | 2025-05-31 21:21:13 (UTC) |
| Local time | 2025-05-31 08:21:13 - [It was morning in the affected area.] |
| Last update | 2025-05-31 21:42:48 (UTC) |
| Magnitude | 6.5 |
| Depth | 33 km |
| Class | Strong |
| Hypocenter | Shallow depth |
| Mercalli scale | 8 |
| Possible effects | Drivers have trouble steering. Houses that are not bolted down might shift on their foundations. Tall structures such as towers and chimneys might twist and fall. Well-built buildings suffer slight damage. Poorly built structures suffer severe damage. Tree branches break. Hillsides might crack if the ground is wet. Water levels in wells might change. |
| Data status | reviewed |
| Data provider | GEONET |
| Continent | Pacific Ocean - East |
|---|---|
| Country | Tonga |
| Administration area | Eua |
| Nearest settlement | `Ohonua |
| Distance | 764 km |
| Course | SSW |
| Surface type | underwater quake |
| Tsunami region | South Pacific |
| Water surface name | South Pacific Ocean |
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 (`Ohonua, Eua, Tonga) settlement within 09:40. (PLEASE NOTE: THIS IS AN ESTIMATE ONLY!)