EARTHQUAKEM4.8

M4.8 earthquake near Nagqu, China

Map: the earthquake near Nagqu, China, with plate boundaries

A magnitude 4.8 earthquake struck 209 km (130 mi) east-northeast of Nagqu, China on Friday, October 23, 2026 at 20:37 UTC, at a depth of 10 km (6 mi), according to the U.S. Geological Survey. Shallow quakes like this one shake the surface hardest. The nearest city of a million or more people is Xining, China, about 852 km (529 mi) away.

MagnitudeM4.8
Depth10 km (6 mi)
Time (UTC)Oct 23 20:37
Location32.47°N 93.94°E
Nearest townNagqu · 209 km
Energy239 tons TNT
Aftershocks M2.5+4
Tsunami flagNo
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Why here?

This earthquake struck about 565 km (351 mi) from the nearest major plate boundary, which makes it an intraplate earthquake. These happen on old faults inside a plate, where stress from the plate’s slow movement is released. They are less common, but can surprise areas that rarely feel quakes.

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 4.8 released roughly the energy of 239 tons of TNT. That is about 16 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 11,000,000 times more than this one.

Aftershocks

In the first 3 days after it, USGS recorded 4 smaller earthquakes of magnitude 2.5 or more within 100 km (62 mi). The largest was a magnitude 4.7 on October 25 at 22:01 UTC.

A stronger magnitude 5.9 followed on October 25 at 11:25 UTC, about 10 km (6 mi) away, so this one is now considered a foreshock.

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 12 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 23, 2026 or earthquakes by day.

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