Japan Meteorological Agency warns of continued seismic risk in Kumamoto following magnitude 7 quake
The Japan Meteorological Agency has cautioned that earthquakes of similar intensity may persist for approximately one week after a magnitude 7 event struck Kumamoto Prefecture on July 28, 2026.
A magnitude 7 earthquake struck Kumamoto Prefecture at approximately 4:30 pm on July 28, 2026, prompting an immediate response from national authorities. The Japan Meteorological Agency (JMA) convened a press conference at 5:30 pm to address the incident, confirming that severe shaking with a Shindo intensity of 7 was recorded in Uto City and Hikawa Town. The agency also noted that Shindo 4 long-period ground motion was observed across the broader Kumamoto region.
During the briefing, the JMA issued a specific warning that earthquakes of similar intensity could occur for about a week. Officials highlighted that while shaking was confirmed in several areas, the exact Shindo levels could not be determined in Kikawa Town and Kosaka Town, leaving the full extent of seismic impact in those localities uncertain. The agency’s geologist, Shinji Kiyomoto, provided details during the conference regarding the ongoing seismic activity.
In response to the potential for coastal hazards, a tsunami advisory was issued for the Ariake and Yatsushiro Seas. The advisory came shortly after the initial tremors, with updates confirming the threat to coastal communities in the region. Authorities are monitoring the situation closely as the advisory remains in effect, urging residents in low-lying areas to remain vigilant.
Transport infrastructure across the Kyushu region was significantly disrupted by the event. JR Kyushu suspended all train services across the island to ensure passenger safety and allow for infrastructure inspections. The suspension affects all lines operated by the railway company, creating substantial logistical challenges for commuters and freight transport in the affected prefectures.
Emergency services in Kumamoto Prefecture have begun receiving reports of injuries, including incidents where individuals were trapped under furniture. Prime Minister Takaichi issued a comment regarding the earthquake, acknowledging the severity of the event. The government is coordinating with local authorities to assess damage and support relief efforts as the region navigates the immediate aftermath of the seismic event.
