Magnitude 7.1 earthquake strikes Kumamoto, Japan; tsunami advisory lifted

A magnitude 7.1 earthquake struck Kumamoto Prefecture in southwestern Japan on July 28, 2026, at 4:27 p.m. local time, registering the maximum intensity level 7 on Japan's seismic scale. The epicenter was located in Kumamoto Prefecture at a depth of 10 kilometers, with coordinates near N 32.6°, E 130.7°. The Japan Meteorological Agency issued an initial tsunami advisory for coastal areas including Ariake Bay and Yatsushiro Bay, predicting waves up to 1 meter (3 feet), but lifted the alert shortly after 6 p.m. local time, approximately two hours after the initial quake.

The earthquake caused widespread damage across Kumamoto and neighboring prefectures in Kyushu. One person was killed and over 100 injured, according to reports. Approximately 45,600–48,000 households lost power. Infrastructure damage included broken roads, collapsed bridges, and damaged buildings. A shopping center in Kasima was partially collapsed, with concerns that dozens of people may have been trapped inside. Multiple fires broke out across the region, and the Aso Kumamoto Airport closed its runway. Shinkansen bullet trains, the West Kyushu Shinkansen, and local rail services in Kyushu were suspended for safety inspections. Japan's Nuclear Regulation Authority reported no abnormalities at three nearby nuclear power plants following the quake.

Prime Minister Sanae Takaichi established a government task force to gather information, assess damage, and prepare for rescue operations. She urged residents to avoid coastlines and exercise caution regarding possible strong aftershocks. Japanese media reported that approximately 300,000 people received evacuation orders, and hundreds of military personnel were deployed for rescue and response operations. The Japan Meteorological Agency warned residents to remain vigilant for additional major seismic activity over the following two to three days.

Numerous aftershocks followed the main quake throughout the evening and into the next day, with magnitudes ranging from 3.4 to 6.1. A magnitude 6.1 aftershock struck at 5:08 p.m., followed by shocks of magnitude 4.2 at 7:03 p.m., magnitude 4.4 at 9:26 p.m., magnitude 4.8 at 11:02 p.m., and magnitude 4.1 at 12:15 a.m. on July 29. The United States Geological Survey initially reported the main quake at magnitude 7.1 but later revised it to 6.8, while the China Earthquake Networks Center measured it at 6.8. The Japan Meteorological Agency maintained its assessment at magnitude 7.1.

This earthquake recalled the devastating 2016 Kumamoto seismic sequence, which killed more than 270 people, injured approximately 2,800, and caused extensive damage to tens of thousands of homes. The 2016 quakes damaged Kumamoto Castle, with restoration works not expected to be complete until 2052. Local fire departments received numerous emergency calls following the 2026 quake, and the Ministry of Defense deployed aircraft to evaluate the situation.