A 6.4 magnitude earthquake struck the northern island of Hokkaido, Japan, early this morning.

Earthquake Details

The quake occurred at 5:23 am local time (9:23 pm BST on Sunday), with the epicenter located 11 miles west of Sarabetsu, a small town in the region. The Japan Meteorological Agency (JMA) reported the earthquake originated at a depth of 50 miles.

Current Status & Recent Activity

As of now, no tsunami warning has been issued, and authorities have not reported any casualties or structural damage. This event follows a 7.7 magnitude earthquake that impacted Japan last week, triggering a tsunami and a nationwide ‘megaquake’ advisory.

Megaquake Advisory

The JMA has clarified that today’s earthquake occurred outside the area covered by the recent megaquake advisory. The special awareness week initiated in response to last week’s event is still scheduled to conclude as planned.

Previous Seismic Events

Last week’s 7.7 magnitude earthquake, with an epicenter in the Pacific Ocean at a depth of just six miles, was felt in Tokyo. Aerial footage showed significant waves along Japan’s coastlines.

Videos circulating online depicted the interior of a Japanese cafe with swaying lights and a rapidly oscillating chandelier, illustrating the intensity of the tremors.

Japan's Seismic Activity

Japan is situated in one of the world’s most seismically active zones, atop four major tectonic plates along the Pacific ‘Ring of Fire’. The nation typically experiences around 1,500 jolts annually, representing approximately 18 percent of global earthquake activity.

Historical Context

The devastating 2011 earthquake, with a magnitude of 9.0, triggered a catastrophic tsunami that claimed 18,500 lives and led to the Fukushima nuclear disaster. In 2024, the JMA issued a special advisory concerning a possible ‘megaquake’ along the Nankai Trough.

Government projections estimate a major earthquake in the Nankai Trough could result in up to 298,000 fatalities and $2 trillion in economic damage. A similar advisory was issued in December 2025 following a magnitude-7.5 tremor, causing injuries to over 40 people.