After a strong earthquake occurred in the middle of the night of December 8 off the eastern coast of Aomori Prefecture in Japan, Shinji Kiyomoto, the Japan Meteorological Agency's earthquake and tsunami countermeasures planning officer, said, “It is speculated that this earthquake occurred at the border between the Pacific plate and the mainland plate. Near the current epicenter, a 7.1 magnitude earthquake occurred in 1943, and another 6.6 magnitude earthquake occurred two days later.” He pointed out, “In regions with strong vibrations, we need to be wary of the possibility of an earthquake with a maximum intensity of '6 strong, 'within about a week after the earthquake occurred. At the same time, the possibility of a stronger earthquake cannot be ruled out.”

After a strong earthquake occurred in the middle of the night of December 8 off the eastern coast of Aomori Prefecture in Japan, Shinji Kiyomoto, the Japan Meteorological Agency's earthquake and tsunami countermeasures planning officer, said, “It is speculated that this earthquake occurred at the border between the Pacific plate and the mainland plate. Near the current epicenter, a 7.1 magnitude earthquake occurred in 1943, and another 6.6 magnitude earthquake occurred two days later.” He pointed out, “In regions with strong vibrations, we need to be wary of the possibility of an earthquake with a maximum intensity of '6 strong, 'within about a week after the earthquake occurred. At the same time, the possibility of a stronger earthquake cannot be ruled out.”