What’s the reason for the two loud noises in Jiaxing?

At 11:38 and 12:53 noon yesterday, two huge sounds of "bang" and "bang", accompanied by a strong earthquake, resounded throughout the Jiaxing area like thunder on the ground. After the two loud noises, there were various speculations and different opinions. After receiving calls from citizens, the party newspaper hotline verified various speculations one by one in an attempt to solve the mystery. Two loud bangs resounded throughout Jiaxing. At 11:38 noon yesterday, a loud bang came from the sky in Hecheng and the ground trembled. Xiao Zhang, who was watching TV at home, clearly felt the vibration of the glass in the house and windows. "What's going on? Is it a thunder or an earthquake?" Xiao Zhang murmured for a while. When he stuck his head out of the window, he saw that everything was normal. However, more than an hour later, at 12:53, a loud noise accompanied by a strong earthquake struck again. This sound was like boiling water, boiling among the citizens. For a time, the office, QQ group and major forums were all talking about these two fleeting loud noises. By collecting calls from citizens and online information, the reporter found that the two loud bangs resounded almost throughout the Jiaxing area. According to the collection of netizens, including more than 50 points in the city, Jiashan, Haining, Haiyan, Tongxiang, Pinghu and other places, not only can you hear these two loud noises, but you can also feel the strong vibrations that follow. "There was a 'bang' sound, the glass in the house shook wildly, and the electric cars downstairs kept buzzing. At first, I thought it was someone doing renovations! Later, when I looked online, I found that many people had encountered this situation." A citizen said . There are endless speculations about where the noise came from. "Is it thunder?" "Isn't it an earthquake?" "I heard that a chemical plant exploded." Yesterday afternoon, in several forums in Jiaxing, journalists and colleagues In the QQ group, everyone made various speculations about the two sudden loud noises. Some said it was thunder, earthquake, some speculated that there was an explosion in a chemical plant or boiler plant, and some even thought that the vibration was caused by construction on the construction site or in the house. Caused by decoration, it can be said that there are many versions. Among the many speculations about the source of the sound, after analysis and elimination by netizens, the three most likely ones were finally selected: an explosion at a boiler factory in Wangjiangjing Town, an explosion at a chemical plant in Buyun, Daqiao Town, and a sonic boom. "There are a lot of planes in the sky this morning, and I think the possibility of a sonic boom is relatively high. When the plane flies at supersonic speed in the air, the air that has been compressed to the extreme is penetrated and generates a shock wave, which finally causes violent fluctuations in pressure to form a sonic boom. "The sonic boom will also make two loud noises, just like thunder." A man surnamed Xu told the party newspaper hotline his guess. According to an online poll, 50% of participants agreed with the sonic boom. After multiple verifications, the answer is still a mystery. In response to various speculations on the Internet, the reporter sought verification from relevant departments one by one. Our city's 110, 120, and 119 telephone lines did not receive any distress calls related to these two loud noises. The Municipal Meteorological Bureau denied the "thunder theory" and made it clear that the sound had nothing to do with the weather. The Municipal Science and Technology Bureau's Earthquake Bureau also stated that there were no earthquakes in the entire Jiaxing area or even Zhejiang Province yesterday. Regarding the "explosion theory" that has attracted high public attention, the reporter contacted Daqiao Town in Nanhu District and Wangjiangjing Town in Xiuzhou District. Both parties stated that there were no factory explosions in their jurisdictions. Staff from the Municipal Safety Supervision Bureau also said that they had not received any similar reports. Regarding the sonic boom, Jiaxing military personnel told reporters that they currently do not know where the two loud noises came from, but they can basically rule out the possibility of sonic boom. At 17:15 yesterday evening, reporters learned from the Municipal Emergency Management Office that the source of the loud noise is still unclear, and relevant municipal departments are actively looking for the cause. Link: When an airplane flies at supersonic speeds in the air, a shock wave forms on the nose or protruding part. The dense sound waves emitted by the aircraft cannot travel to the front of the aircraft, so they are all stacked behind the fuselage, forming a cone-shaped sound cone. When they propagate outward, they interfere and influence each other, and then converge into a front shock wave including the nose and a trailing rear shock wave. When these two shock waves are reflected in human ears, they are like two thunderous bangs. This sound is called a "sonic boom."