Magnitude 7.1 earthquake hits Kumamoto, Japan; tsunami warning issued for Kyushu coast
A magnitude 7.1 earthquake struck Kumamoto prefecture in southern Japan at 16:27 local time on Tuesday, at a shallow depth of 10 km. The Japan Meteorological Agency issued a tsunami warning for a one-meter wave, and emergency alerts were sent to seven prefectures on Kyushu island.
The earthquake
A magnitude 7.1 earthquake struck the Kumamoto region of southern Japan on Tuesday, July 28, 2026, at 16:27 local time. The Japan Meteorological Agency (JMA) placed the epicenter in Kumamoto prefecture, on the island of Kyushu, with a shallow focal depth of 10 km. The tremor reached the maximum level 7 on Japan's Shindo seismic intensity scale, indicating violent shaking near the epicenter. The quake was felt across a wide area, and the government issued emergency earthquake alerts for seven prefectures: Kumamoto, Nagasaki, Kagoshima, Fukuoka, Saga, Oita, and Miyazaki.
Tsunami warning
Immediately after the quake, the JMA issued a tsunami warning for coastal areas, forecasting a wave height of one meter. The warning called on residents to leave the shore and move to higher ground.
The sea and the area near the coast are dangerous. Those at sea must immediately get out of the water and move away from the coast. Since sea currents remain strong, please do not enter the sea or approach the coast until the warning is lifted. In some areas, the tsunami height may exceed the 'expected tsunami height'.
The Pacific Tsunami Warning Center (PTWC) later confirmed that there was no tsunami threat to Hawaii and American Samoa from this event.
Response and damage assessment
Authorities are still evaluating the situation, but as of the latest reports there were no immediate official confirmations of casualties or extensive damage. Inspections of infrastructure and transport networks are underway. Seismologists cautioned that strong aftershocks are likely, a common occurrence after earthquakes of this magnitude. Residents in the affected prefectures were advised to remain alert and follow official guidance.
- Magnitude 7.1 earthquake strikes Kumamoto region, southern Japan
- Japan Meteorological Agency warns of a one-meter tsunami for coastal areas
- Government sends alerts to seven prefectures on Kyushu island
- Pacific Tsunami Warning Center confirms no threat to Hawaii and American Samoa
Seismic context
Japan lies on the Pacific "Ring of Fire," one of the most seismically active zones on the planet, where strong earthquakes and preventive tsunami warnings are frequent. In the Kumamoto area, 42 earthquakes had been recorded in the 30 days preceding this event, according to local monitoring data. The July 28 quake was the largest in that sequence.
