当地时间19日晚间，日本多地都观测到神秘"光球"。包括日本关西机场的安保摄像头及多地都记录到 了"光球"划过夜空的一刻。 视频显示，原本昏暗的夜空中突然划过一个高亮的蓝白色"光球"，整片夜空被其照亮，随后"光球"在接 近地面时颜色转为白黄色，映照出的部分天空的颜色也随之改变，"光球"消失后，夜空又恢复正常。 鹿儿岛地区的气象台表示，鹿儿岛县的多个观测站同时记录到光亮，樱岛地区的观测仪器检测到空气振 动。截至目前，鹿儿岛地区气象部门仅能推测该现象可能是陨石或火流星，但具体成因仍有待核查。 ...

Core Points - A series of bright fireballs, or "fire meteors," have been observed across various regions in China, including Beijing, Guangdong, and Hainan, causing significant public interest and concern due to their brightness and accompanying loud explosions [7][9][11] - These fireballs are identified as typical fire meteors, which are significantly brighter than regular meteors, often exceeding a brightness of -3 magnitude, and can illuminate the night sky [9][11] - The recent fireball events are linked to the active Tau Aquariids meteor shower, which occurs when Earth passes through debris left by the 73P/Schwassmann-Wachmann 3 comet [18][20] Summary by Sections Fireball Observations - Residents in multiple cities reported witnessing bright fireballs in the night sky, with some initially mistaking them for lightning or explosions [7] - The fireball observed in Guangdong was noted to be 10 to 20 times larger than typical meteors, entering the atmosphere at a speed of 15 kilometers per second and generating temperatures exceeding 2000°C [11][12] Characteristics of Fire Meteors - Fire meteors are classified as "occasional meteors" with no predictable patterns, often resulting from irregularities in the meteor's density and structure, leading to explosive sounds upon atmospheric entry [12][13] - The energy released during these events can be substantial, with estimates ranging from 500 to 2000 tons of TNT equivalent, and specific events recorded energy releases of approximately 1500 tons of TNT [15] Composition and Coloration - The fireball's vibrant colors are attributed to the combustion of various elements such as calcium, magnesium, sodium, and iron, each emitting different wavelengths of light [17] - The fireball's diameter is estimated to exceed 2 meters, and its high-speed entry into the atmosphere results in a "daylight effect" due to the immense energy released [15][17] Historical Context and Meteor Showers - Historical records indicate that fire meteor events are not uncommon, with notable past occurrences leading to significant meteorite falls [26][38] - The Tau Aquariids meteor shower is a result of Earth passing through debris from a comet that has fragmented over time, contributing to the frequency of fireball sightings during this period [20][24]