Could it be a missile? Is it an airplane, a fireball, or a meteorite?

About 30 reports, no confirmed fires or accidents

FNN Prime Online

On February 17th, an explosion occurred in Kurume City, Fukuoka Prefecture. The reporting team embarked on a follow-up interview to find out the identity of the mysterious explosion. [Image] A shock wave captured by a seismometer The sound of an explosion resounded in Kurume City on the evening of the day in question, whether an "object exceeding the speed of sound" had crossed. The sound was recorded by security cameras in various places. Person who heard the explosion: Dawn. Low (sound). People who heard the sound of an explosion that shook the building as if it had been hit by wind pressure: Buff, it was only for a moment, but immediately after hearing the sound of the cat, about 30 calls were made to the police and fire departments in Kurume City. The police investigated all over the city, but there were no fires or accidents. There was no confirmation of damage such as damage to property, let alone human damage. In subsequent interviews, it was found that this sound was confirmed not only in Kurume City, but also in neighboring Tachiarai Town and Asakura City.

"Supersonic object" passes through and generates a shock wave?

What is the identity of this mysterious explosion sound? At the moment of its occurrence, seismometers installed around Kurume city captured the shock wave. As a result of analyzing the remaining data, it was found that just after 4:00 pm on February 17, when the sound was generated, "an object exceeding the speed of sound" was crossing the sky above Kurume City. Assistant Professor Masumi Yamada, Disaster Prevention Research Institute, Kyoto University: It's completely different from an earthquake. Something is moving faster than the speed of sound in the sky. When an object travels faster than the speed of sound, a shock wave is produced that can be felt as sound or vibration.

A Self-Defense Force aircraft also flew at the same time...

Furthermore, according to expert analysis, in addition to the shock wave that spread over Kurume City after 4:00 p.m. A shock wave was also confirmed at the location. It is around Tsuiki Base, more than 50 km northeast of Kurume City. When I inquired with the Air Self-Defense Force, I got a reply that "two F2 fighters belonging to Tsuiki Air Base were flying near Kurume City around 4:10 pm". As if to support this, there was also the following post on SNS. "Probably a sonic boom. Right after that, I heard the sound of a jet plane." Did the Tsuiki Air Base fighters fly faster than the speed of sound over Kurume City? A spokesperson for the base categorically denied that the Japan Self-Defense Forces jet was responsible for the mysterious explosion. Person in charge at Tsuiki Air Base: We didn't set the speed of sound, and there were no abnormalities in the post-landing inspection, and there were no parts falling off. 's abnormal flight has not been picked up by radar." If it wasn't an airplane, what was the object that moved over Kurume City at the speed of sound? I inquired with the Fukuoka City Science Museum, but there is no information that a fireball or meteorite was confirmed on that day.