Sonic booms heard over US' Area 51 spark claims accusing CIA of covering up alien evidence – Watch
Conspiracy theories have claimed that the sonic booms show the CIA is secretly testing alien technology or hypersonic aircraft.
Dec 07, 2017, 18:26 PM ISTTremors in US Northeast caused by sonic boom, not quake: Report
Sonic booms are often mistaken for seismic activity, according to the USGS website.
Jan 29, 2016, 04:11 AM IST