M3.5
Depth:
0.0 km
M3.5 Earthquake near Suspected mining event, 15 km SW of Greater Sudbury, ON/Événement minier soupconné, 15 km SO de Grand Sudbury, ON (Canada)
About this earthquake
A magnitude M3.5 earthquake was recorded near Suspected mining event, 15 km SW of Greater Sudbury, ON/Événement minier soupconné, 15 km SO de Grand Sudbury, ON (Canada) on October 24, 2025 at 15:20 UTC. With a focal depth of about 0 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Shaking of this size is frequently noticed but usually harmless.
Map
Depth profile
Shallow
0 km
0 km — shallower than the regional average (5.8 km)
Regional average: 5.8 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
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