Is it an explosion? An earthquake? Fighter jet breaking sound barrier over Chinese city startles residents

The maker of China’s most advanced military aircraft confirmed that loud bangs heard by residents southwest China on Thursday was not an explosion but a sonic boom from a fighter jet.
The event occurred when a fighter jet from the Chengdu Aircraft Industrial Group flying above Chengdu, the capital of Sichuan province, broke the sound barrier, The Beijing News reported.
The company is leading manufacturer of military aircraft including the advanced Jian-7, Jian-10 and Jian-20 stealth fighter.
Residents in the city and neighbouring counties reported hearing blasts at about midday, arousing fears that a massive explosion had taken place.
A man living near the city’s Shuangliu Airport said he heard a couple of bangs.
“It was like thunder, but duller,” he was quoted as saying. Another internet user said windows shook at his home like during an earthquake.