TOKYO, Japan: 09-12-2025] A massive undersea earthquake, which was measured primarily at a magnitude 7.6 later being revised to 7.5, struck off the Pacific coast of northeastern Japan on late Monday night, shaking the entire region and triggering an urgent tsunami warning. The powerful earthquake, which occurred at approximately 11:15 p.m. local time (14:15 GMT), which led to immediate evacuation orders by government and widespread alarm buzzing across coastal areas with giving coastal Japan Earthquakes Tsunami Warning.
However, in a recent development and a relief to the nation, when the Japan Meteorological Agency (JMA) confirmed on early Tuesday morning that all Japan earthquake tsunami warning alerts and subsequent advisories have been lifted. While a low power tsunami was observed at Japan’s coastal areas, the immediate danger of more lethal waves has lowered, allowing authorities to focus on damage assessment and public safety works.
The Initial Shock: Magnitude and Evacuations and Japan earthquakes tsunami warning
The center of the powerful quake was located approximately 80 kilometers off the coast of Aomori area, at a relatively shallow depth of about 54 kilometers. The earthquake registered a violent “upper 6” on Japan’s seven-point seismic scale in few parts of Aomori, a level strong enough to make it impossible to stand at seacoasts, according to the JMA. The shocks were also felt highly across the northern island of Hokkaido and down to central Tokyo.
The immediate and automatic government people safety response, after the situation is a braking news of Japan news today during and after the seismic shocks, saw the JMA issue a major tsunami warning for Hokkaido, Aomori, and Iwate area. Initial forecasts predicted waves reaching up to three meters (10 feet) high, which could cause significant damage. This led to urgent evacuation orders for an estimated 90,000 residents, who were told to move to higher ground immediately. The quick and orderly evacuation, driven by quick smartphone alerts and public broadcaster warnings, helps with a minimizing potential casualties.
Assessing the Impact: Injuries and Infrastructure
Despite the severity of the quake, the damage appears to be lower than the expected. The largest tsunami wave recorded was 70 centimeters (28 inches) at Kuji Port in Iwate area, with other locations observing waves between 20 to 50 centimeters. While these waves caused minor damage, such as disturbing oyster rafts, they did not lead to the further widespread destruction that was initially warned.
Key reports on the impacted regions of Japan:
Casualties: At least 30 people were reported injured across Aomori, Hokkaido, and other nearby regions. Most injuries were minor, resulting from falling objects and furniture. One person in Hokkaido was reported to be seriously injured.
Power & Utilities: Approximately 2,700 homes in Aomori temporarily lost power overnight. Utility companies, including Tohoku Electric Power, swiftly restored the service, with power largely back online by Tuesday morning.
Transportation Damages: Bullet train services on the Tohoku Shinkansen line were temporarily suspended as engineers conducted mandatory safety checks of the tracks. This left few of the travelers stranded for a while, including around 200 passengers at New Chitose Airport in Hokkaido.
Nuclear Safety: The government and the Nuclear Regulation Authority (NRA) confirmed that no abnormalities were detected at any nuclear facilities in the region, including the Higashidori and Onagawa nuclear plants. A minor spill of water (about 450 liters) occurred from a used fuel cooling area at the Rokkasho reprocessing plant, but officials stated the water level remained normal and posed no safety risk.
The Looming Threat: A “Megaquake” Alert
While the immediate Japan tsunami threat has reduced, but the long-term warning comes from the JMA, which has issued a special advisory on the possibility of a subsequent, larger earthquake. The JMA cautioned that there is a slightly increased risk of a magnitude 8 scale event may be possibly occurring at the northeastern coast from Hokkaido down to Chiba area within the next week.
This warning is particularly given the quake’s location near the Japan Trench, the tectonic boundary that produced the devastating 2011 Great East Japan Earthquake (M 9.0) and tsunami, which claimed nearly 20,000 lives. Knowing the lessons from that previous catastrophe, the government is requested residents in 182 municipalities to maintain an elevated level of emergency readiness for the next seven days.
Prime Minister Sanae Takaichi, who activated an emergency task force shortly after the quake, urged citizens to remain aware and safe. “We are putting people’s lives first and doing everything we can,” she stated, adding, “Please listen to information from the JMA and local governments for about a week and be prepared to evacuate when you feel earthquake.”
The event serves as a strict reminder of Japan’s location on the tectonically active Pacific “Ring of Fire,” a geological setting that makes it one of the world’s most earthquake-prone countries. The nation’s advanced early warning systems and robust emergency protocols were once again important and played a major rile in minimizing the human cost of such major earthquake event.
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