Japan officials warn of potentially strong aftershocks after quake kills 13, with more than 100 reported

A deadly earthquake in Japan that killed 13 people was followed by a surge of aftershocks, with officials warning that additional strong shaking could occur. By late July 29, more than 100 aftershocks had been recorded, according to BBC reporting, as emergency teams continued assessments and response operations in affected areas.

Japan’s weather and disaster authorities urged residents to stay alert, noting that aftershocks can be stronger than earlier tremors and can trigger new hazards such as additional building damage, landslides, and infrastructure disruptions. Officials told the public to monitor official alerts and follow local guidance, given the changing pattern of seismic activity.

BBC reported that the risk was not limited to minor shaking, with officials saying aftershocks could potentially reach magnitude 7. That warning raised concern for areas still recovering from the initial quake’s impact, including households dealing with damaged structures and local authorities managing ongoing safety checks.

The death toll of 13 came from the initial earthquake, and the aftershock sequence added pressure on local services responsible for rescue coordination, shelters, and verification of damage. Even when aftershocks do not cause new casualties, repeated ground movement can delay repairs and complicate evacuation and return decisions.

Emergency officials also continued monitoring for secondary threats that often accompany major earthquakes, including fires, unstable roads, and risks from disrupted utilities. With continuing tremors, responders faced the operational challenge of entering damaged sites while maintaining safety during intermittent shaking.

The aftershock count and the magnitude warning reflect the instability that frequently follows large seismic events. Authorities typically adjust public messaging as new measurements come in, and residents are advised to keep preparedness steps in place even after initial impacts subside.

As of the latest reporting, officials had not indicated that the shaking had fully ended, and authorities continued to urge vigilance. Further updates are expected as seismic agencies refine forecasts and as local governments reassess damage and the status of infrastructure and housing for affected residents.