Post by Swati
TOKYO, JAPAN | August 23, 2026
A magnitude 5.9 earthquake struck southern Ibaraki Prefecture in the early hours of Sunday, sending powerful tremors across Tokyo and large parts of eastern Japan, triggering emergency alerts on mobile phones and leaving at least 37 people injured across five prefectures.The earthquake occurred at around 2:00 a.m. local time, with the Japan Meteorological Agency (JMA) placing the epicentre in southern Ibaraki at a depth of about 68–70 kilometres. The strongest shaking reached lower 5 on Japan’s seven-level seismic intensity scale in parts of Ibaraki, Saitama, Chiba and Tokyo. The tremor was strongly felt across the Tokyo metropolitan area and the wider Kanto region, prompting residents to react to emergency earthquake warnings as buildings and household items shook during the night.At Least 37 People Injured.According to Japanese authorities, at least 37 people were injured in Tokyo, Ibaraki, Saitama, Chiba and Kanagawa prefectures. Most injuries were minor and occurred after people were startled awake by the sudden shaking, causing some to fall from beds or collide with furniture and doors.One woman in her 80s in Yokohama reportedly suffered a serious hip injury after falling from her bed during the earthquake. The number of injured initially stood lower as local authorities began assessing the situation, but the figure later rose to 37 as reports from different prefectures were consolidated. Emergency Alerts Sound Across Tokyo.The earthquake triggered Japan’s earthquake early-warning system, with emergency notifications reaching mobile phones in affected areas.Residents in Tokyo and neighbouring prefectures reported strong shaking during the early morning hours. The sudden alerts and tremors caused alarm among people who were asleep at the time.Japan’s sophisticated earthquake warning network is designed to provide residents with precious seconds of advance notice before strong shaking arrives, allowing people to take protective measures.Ibaraki Confirmed as Epicentre.The Japan Meteorological Agency identified southern Ibaraki Prefecture as the earthquake’s epicentral region.The JMA estimated the earthquake at magnitude 5.9 and a depth of around 68 kilometres, while other Japanese seismic monitoring data also recorded the event in southern Ibaraki. The earthquake occurred in a region known for recurring seismic activity. Japanese authorities warned residents in areas that experienced strong shaking to remain cautious because another earthquake of similar strength could occur.No Tsunami Threat.Despite the strong shaking, there was no tsunami threat following the earthquake.Authorities continued to monitor the situation and assess infrastructure, transport networks and essential services. Japan’s nuclear safety authorities also reported no abnormalities at nuclear power plants and other facilities handling nuclear materials. Train Services Disrupted.The earthquake also caused temporary disruption to rail services in the Tokyo region.Several express trains serving Tokyo and Narita Airport, along with some local railway services in northeastern areas, were delayed as operators carried out safety inspections following the tremor.However, Shinkansen bullet train services were largely unaffected and continued operating normally, according to reports. The temporary railway checks were part of standard safety procedures following strong seismic activity.Water Pipe Rupture Reported in Tokyo.The earthquake also resulted in an underground water pipe rupture in Tokyo’s Koto Ward, with water reportedly flowing onto a roadway.Authorities subsequently repaired the damaged pipe and stopped the leak. Officials continued checking infrastructure for any additional damage caused by the shaking. Authorities Warn of Possible Aftershocks.The Japan Meteorological Agency has urged residents in areas that experienced strong shaking to remain vigilant for possible aftershocks.Officials warned that earthquakes of similar strength could occur during the following week, particularly in areas that experienced the strongest shaking. Residents have been advised to secure unstable objects, stay away from damaged structures and follow official instructions in case further shaking occurs.Government Activates Response Mechanism.The Japanese government moved to assess the earthquake’s impact and coordinate the emergency response.Prime Minister Sanae Takaichi said a government task force had been established to assess possible damage and coordinate information from affected areas. Officials were also monitoring critical infrastructure and public services as authorities continued gathering information from across the Kanto region.Japan’s Earthquake Preparedness Tested Again.The latest earthquake once again highlighted Japan’s exposure to seismic activity. The country sits in one of the world’s most earthquake-prone regions and has developed extensive earthquake monitoring, early-warning and disaster-response systems.The ability of emergency systems to issue alerts quickly following Sunday’s tremor helped residents prepare for the shaking, while railway operators and other infrastructure agencies immediately began safety inspections.Although the earthquake caused injuries and temporary disruptions, there were no reports of a major catastrophe or tsunami emergency.Authorities are continuing to monitor seismic activity around southern Ibaraki and the wider Kanto region, while residents have been urged to remain prepared for possible aftershocks.
