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M5.1 Earthquake
◍ south of Tonga · · updated 8/21/2026, 8:30:39 AM
Severity score
58/100
Confidence
High
Why this matters
Aftershock sequence may follow a mainshock of this size.
Key stats
Magnitude
5.1
Depth
10 km
Timeline
- M5.1 recorded8/21/2026, 8:12:34 AMsouth of Tonga
Sources & attribution
ScientificUSGS Earthquake Hazardsupdated 8/21/2026, 8:30:39 AM
⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.