Magnitude 5.1 earthquake strikes 85 km SE of Tatsugō, Japan

A magnitude 5.1 earthquake struck 85 km southeast of Tatsugō, Japan, on Thursday, July 23, 2026, at 09:22:22 GMT. The United States Geological Survey (USGS) reported the seismic event occurred at a depth of 10 kilometers. Its epicenter was located at coordinates 27.8812 latitude and 130.1887 longitude.

The USGS utilizes a global network of seismograph stations to detect and measure ground motion caused by earthquakes. The magnitude, a measure of the energy released at the earthquake's source, is calculated from these seismic waves. The location is determined by triangulating the arrival times of these waves at different stations, and depth is similarly derived from wave patterns.