🟣
M5.4 Earthquake
◍ South Sandwich Islands region · · updated 8/21/2026, 3:15:52 PM
Severity score
63/100
Confidence
High
Why this matters
Aftershock sequence may follow a mainshock of this size.
Key stats
Magnitude
5.4
Depth
159 km
Severity over time
Timeline
- M5.4 recorded8/21/2026, 1:06:40 PMSouth Sandwich Islands region
Sources & attribution
ScientificUSGS Earthquake Hazardsupdated 8/21/2026, 3:15:52 PM
⚠This is an informational severity score, not an official warning. Follow guidance from NWS/NOAA, FEMA (ready.gov), and local emergency management.