EARTHQUAKEM4.7

M4.7 earthquake near Serrezuela, Argentina

Map: the earthquake near Serrezuela, Argentina, with plate boundaries

A magnitude 4.7 earthquake struck 39 km (24 mi) south-southwest of Serrezuela, Argentina on Wednesday, October 28, 2026 at 07:02 UTC, at a depth of 186 km (116 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 Cordoba, about 141 km (87 mi) away.

MagnitudeM4.7
Depth186 km (116 mi)
Time (UTC)Oct 28 07:02
Location30.96°S 65.57°W
Nearest townSerrezuela · 39 km
Energy169 tons TNT
Tsunami flagNo
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Why here?

This earthquake struck 186 km (116 mi) down, about 671 km (417 mi) from the nearest plate boundary on the surface. Quakes this deep happen inside old ocean plate that has sunk far into the mantle at a subduction zone, long after it dove beneath its neighbor. Their great depth spreads the shaking over a wide area but usually keeps it gentle at the surface.

The red lines on the map are plate boundaries.

How strong was it?

Magnitude is logarithmic: each whole step releases about 32 times more energy. This magnitude 4.7 released roughly the energy of 169 tons of TNT. That is about 11 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 16,000,000 times more than this one.

Earthquake history here

Before this earthquake, USGS had recorded 17 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 28, 2026 or earthquakes by day.

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