Un magnitude 7,6 earthquake It has shaken northern Japan and forced the immediate activation of emergency protocols. tsunami warning across much of the Pacific coast. The earthquake, with its epicenter off the coast of Aomori Prefecture, has generated waves up to 70 centimeters high and triggered evacuation orders for tens of thousands of people on the country's northeast coast.
Japanese authorities They have insisted that those living in low-lying areas near the sea remain in higher ground or designated shelters until further notice, while emergency teams and the Japan Meteorological Agency (JMA/AMJ) continue to monitor for possible aftershocks and sea level changes. The earthquake was clearly felt from the north of the archipelago to the Kanto region, including Tokyo, although no catastrophic damage has been confirmed.
Epicenter, magnitude and how the earthquake was felt
The main tremor was recorded at 23: 15 local time (15:15 PM in mainland Spain) off the coast of Aomori Prefecture, in northeastern Japan. The hypocenter was located at a depth of about 50 kilometers. under the seabed, at a distance of between 70 and 80 kilometers from the coast, according to data from the JMA and the first reports from the Meteorological Agency.
On the Japanese seismic scale, which consists of seven levels and measures the intensity of shaking at the surface, the earthquake reached a Level 6 upper in Hachinohe CityThis implies serious difficulties in remaining upright and a high risk of falling objects inside buildings. In the nearby towns of Oirase and Hashikami, a lower level 6, while in Tokyo, more than 600 kilometers to the south, the intensity was level 2.
La The seismic wave was felt over a very wide area The tremor was felt throughout the country, from Hokkaido and Tohoku to areas in the central and eastern parts of the archipelago. Residents explained to local media and public broadcasters like NHK that the earthquake was prolonged and clearly perceptible, although in many modern urban areas buildings responded as expected thanks to stringent seismic codes.
In the hour following the first earthquake, the following were recorded several replicasAmong them was one of magnitude 5,6 and others of 3,6 and 3,9. Experts emphasize that this pattern is common after a strong earthquake in the Northwest Pacific, but stress that An event of similar intensity cannot be ruled out. in the coming days.
Tsunami alert: waves, warnings and gradual withdrawal of the warning
As soon as the earthquake was detected, the Japan Meteorological Agency activated a tsunami warning of up to 3 meters for the coasts of Aomori, neighboring Iwate, and the southern part of Hokkaido, the northernmost island in the country. Simultaneously, warnings of lesser intensity for Miyagi, Fukushima and other areas of the Pacific coast, including much of the eastern strip of the archipelago.
Initial measurements confirmed the arrival of a tsunami wave of about 40 centimeters in the port of Mutsu-Ogawara (Aomori) at approximately 23:43 p.m. local time. Minutes later, a swell with similar characteristics was observed in the port of Urakawa, Hokkaido. Later, in the early morning, the systems recorded a maximum height of about 70 centimeters at Kuji port, in Iwate Prefecture.
Although the figures may seem moderate, authorities stressed that even waves less than one meter high can cause very dangerous currents In ports, rivers, and low-lying coastal areas, with the capacity to sweep away vehicles or people. Therefore, the message was clear: stay away from beaches, dikes, and river mouths for hours.
As time passed and the sea stabilized, the JMA lowered the tsunami alert to simple notices in the most affected prefectures and subsequently began to withdraw them gradually. However, the agency kept the population on alert for the possibility of further sea level disturbances associated with strong aftershocks.
Mass evacuations and the situation of the wounded
In response to the activation of the alert, local authorities launched a broad preventive evacuation operation. About 23.000 people Residents of Hokkaido, Iwate, and Miyagi prefectures were urged to temporarily leave their homes and move to emergency shelters or higher inland areas.
At times, especially in the initial statements, higher figures for potential evacuees were used, given that regional governments were considering scenarios affecting up to 90.000 people if the tsunami situation worsened. Ultimately, the number of residents who actually had to evacuate their homes was lower, but the system remained ready for rapid expansion if needed.
The Prime Minister, Sanae Takaichi, confirmed in his initial appearance that at least Seven people had been injured In the prefectures of Aomori and Hokkaido, injuries were reported primarily from falls during the earthquake or during evacuations. Local media have reported specific incidents, including several people injured at a hotel in Hachinohe and residents affected by falling objects.
Other preliminary counts from the Fire and Disaster Management Agency speak of more than twenty injuredincluding one person in serious condition, although these figures are still subject to official verification. In any case, most of the injured reportedly suffered bumps, bruises, or cuts resulting from the movement of furniture and minor structural elements.
Japanese Government Response and Emergency Management
The central government moved swiftly. As soon as the magnitude of the earthquake and the tsunami risk became known, Prime Minister Sanae Takaichi ordered the creation of a special crisis team at the Tokyo government headquarters (Kantei) to coordinate the response together with the affected prefectures.
In his remarks, Takaichi emphasized that the Executive is collaborating closely with local authorities to prioritize the protection of life and minimize damage. It also demanded that the relevant agencies provide clear and consistent information to the public, both through public media and mobile phone alert systems.
The Chief Cabinet Secretary, Minoru CurlyHe appeared before the press to reiterate the call for caution. He asked residents in coastal areas to Do not leave the shelters or high areas until official alerts are completely lifted, stressing that danger may persist even if the sea appears calm.
At the operational level, the regional governments deployed fire crews, police and emergency personnel to assess damage to infrastructure, roads, and bridges, as well as to ensure access to hospitals and evacuation centers. In some areas of Aomori and Hokkaido, there were brief disruptions to rail services while safety inspections were carried out on tracks and at stations.
Nuclear power plant, seismic risk and relationship with Europe
One of the aspects that generates the most international attention whenever a major earthquake occurs in Japan is the state of its nuclear power plantsespecially since the Fukushima disaster in 2011. This time, the Tohoku Electric Power company, which operates the power plants in Higashidori and OnagawaLocated in the area where the earthquake was felt most strongly, the company announced that it is thoroughly reviewing the facilities.
So far, the Japanese government and the company have reported that No anomalies have been detected There are no findings regarding radiation levels or the safety systems of the nuclear power plants in Hokkaido, Aomori, Miyagi, and Fukushima. Despite this, inspections continue as a precautionary measure, and specialized international agencies continue to receive updated technical data.
From Europe and Spain, this new episode of seismic activity in Japan brings back to the table the debate on preparedness for natural disasters in coastal areas and regions with seismic risk. Although the geological context is very different, the so-called Pacific Ring of Fire—where Japan is located—concentrates a very significant portion of earthquakes of magnitude greater than 6 globally, making the Asian country a world leader in prevention.
For the European scientific community and civil protection services, the Japanese system of early warning of earthquakes and tsunamisWith more than a thousand seismographic stations distributed throughout the territory, it serves as a model for improving its own protocols against seismic and maritime risks, especially in the eastern Mediterranean, the Atlantic and volcanologically active areas.
Japan, a country accustomed to earthquakes but on alert for a major one
Japan settles in the heart of Pacific Ring of FireIt is an extensive subduction zone where several tectonic plates converge and many of the planet's active volcanoes are concentrated. This location explains why the archipelago registers thousands of earthquakes a yearSome are so mild that they are only detected by instruments, and others, like the current one, are clearly perceptible to the population.
Japanese authorities have issued, for the first time in this episode, a specific alert regarding the possibility of another strong earthquake in the coming days in the northern regions of Hokkaido and Sanriku. This warning will remain in effect for one week, during which time residents are asked to prepare emergency kits, basic food supplies, and family evacuation plans.
Collective memory continues to be marked by the 2011 Tohoku earthquakeThe magnitude 9 earthquake triggered a devastating tsunami and the Fukushima nuclear crisis, resulting in over 10.000 deaths and enormous material damage. Since then, the country has reinforced seawalls, revised coastal urban development plans, and modernized its emergency communication systems.
Compared to that disaster, the current earthquake has, so far, had a much more limited human and material impact. However, both the government and the scientific community insist that this type of event It serves as a constant reminder of the level of seismic threat to which the archipelago is subjected and the importance of not letting our guard down.
As the hours pass, Japan is gradually returning to normal in the areas where the tsunami warning has been lifted, but the country remains focused on seismographs and the sea: the great 7,6 magnitude earthquake and the subsequent tsunami warning have demonstrated once again the Japanese emergency system response capacityAt the same time, the debate is reopened in Spain and the rest of Europe about how prepared we are to face extreme natural phenomena in a scenario of increasing risk.
