7.5级强震后，日本警告：后续或有更大地震

Core Viewpoint - A 6.6 magnitude earthquake occurred off the eastern coast of Honshu, Japan, on December 9, 2025, with a depth of 30 kilometers, leading to injuries, evacuations, and power outages in several regions [5][7][11]. Earthquake Details - The earthquake was initially reported as a 7.5 magnitude by the Japan Meteorological Agency [6]. - The earthquake resulted in multiple injuries in Hokkaido and Aomori Prefecture, prompting evacuation orders in Hokkaido, Aomori, Iwate, Miyagi, and Fukushima Prefectures [7]. - Tsunami warnings were issued, with wave heights reaching up to 70 centimeters in Iwate Prefecture and between 10 to 50 centimeters in other areas [8]. Impact on Infrastructure - A fire broke out near a nursery in Aomori City following the earthquake, with significant smoke observed [9]. - Approximately 3,900 households in Aomori and 300 in Iwate experienced power outages due to the earthquake [11]. - The planned discharge of nuclear contaminated water from the Fukushima Daiichi Nuclear Power Plant was halted following tsunami warnings [14]. Nuclear Facilities Status - No abnormalities were reported at the Fukushima Daiichi and Daini Nuclear Power Plants after the earthquake [17]. - At a nuclear waste treatment facility in Aomori, over 100 liters of water overflowed from a spent fuel pool, but it was contained within the building and did not pose a safety risk [15]. Future Risks - The Japan Meteorological Agency warned of the potential for stronger aftershocks in the following week [18]. - An expert meeting is expected to release estimates of potential damage from a hypothetical 7.3 magnitude earthquake in Tokyo, predicting 18,000 fatalities and economic losses of 83 trillion yen [18][19].