EARTHQUAKEM5.2

M5.2 earthquake near Severo-Kuril’sk, Russia

Map: the earthquake near Severo-Kuril’sk, Russia, with plate boundaries

A magnitude 5.2 earthquake struck 101 km (63 mi) south-southwest of Severo-Kuril’sk, Russia on Sunday, October 11, 2026 at 17:00 UTC, at a depth of 83 km (52 mi), according to the U.S. Geological Survey. At this intermediate depth, shaking spreads out before it reaches the surface. The nearest city of a million or more people is Sapporo, Japan, about 1,332 km (828 mi) away.

MagnitudeM5.2
Depth83 km (52 mi)
Time (UTC)Oct 11 17:00
Location49.79°N 155.79°E
Nearest townSevero-Kuril’sk · 101 km
Energy951 tons TNT
Aftershocks M2.5+0
Tsunami flagNo
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Why here?

This earthquake struck about 154 km (95 mi) from the boundary between the North American and Pacific plates. Most earthquakes happen along plate boundaries like this one, where the pieces of Earth’s outer shell collide, pull apart or grind past each other. Stress builds up over years until the rock suddenly slips. At 83 km down, it most likely broke inside a plate that is sinking into the mantle beneath its neighbor, in what geologists call a subduction zone.

The red lines on the map are plate boundaries.

What kind of fault?

USGS’s analysis of the seismic waves shows it was a thrust (reverse) earthquake: one block of crust was pushed up and over another, as happens where plates collide.

How strong was it?

Magnitude is logarithmic: each whole step releases about 32 times more energy. This magnitude 5.2 released roughly the energy of 951 tons of TNT. That is about 63 times the energy of a magnitude 4.0, a quake people nearby feel but that rarely causes damage. The strongest earthquake ever recorded, magnitude 9.5 in Chile in 1960, released about 2,800,000 times more than this one.

Aftershocks

In the first 15 days after it, USGS recorded no smaller earthquakes of magnitude 2.5 or more within 100 km (62 mi).

Outside the United States, USGS mainly lists quakes of about magnitude 4 and up, so smaller aftershocks there are undercounted.

Earthquake history here

Before this earthquake, USGS had recorded 171 earthquakes of magnitude 6 or larger within 300 km (186 mi) since 1900. The strongest:

Official details, updates and the shaking map: USGS event page.

See every earthquake on October 11, 2026 or earthquakes by day.

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