Exploding meteor startles Utah

A loud boom that shattered the Saturday morning quiet in Utah may have been a Perseid meteor. 

According to The Deseret News, the noise startled northern Utah at about 8:32 a.m. local time. Numerous home security and doorbell cams caught the sound. Seismographs ruled out an earthquake, and the National Weather Service Salt Lake City soon posted a radar image of two red flashes on a lightning monitor — in a spot where there was neither lightning nor a storm. The flashes were likely the meteor trail and flash, according to the weather service. 

Home security camera footage from Roy, Utah, soon clinched the identification: Posted to Twitter, the video shows a blue fireball streaking across the morning sky just before the boom.

Numerous reports of the fireball were posted to the American Meteor Society. 

Related: What’s the difference between asteroids, comets and meteors?

There have been no reports of meteorites found from the explosion, though a NASA volunteer told KSLTV that the explosion may have scattered space rock fragments across the area. The destruction of the meteor makes it hard to determine where it originated from, but a likely culprit is the Perseids, experts told the Deseret News. 

The Perseid meteor shower occurs each year in July and August as Earth swings through debris left by the comet 109P/Swift-Tuttle. Most of this debris is miniscule, but it hits Earth's atmosphere at 133,200 mph (214,360 km/h), according to the American Meteor Society. This year, the Perseids peaked on Aug. 11 and 12. 

Meteors create sonic booms when they move across the atmosphere faster than the speed of sound, according to CalTech's CoolCosmos. Because light moves faster than sound, the "boom" of a traveling meteor usually comes several seconds after the sight of the fireball. But in most cases, meteors are too high in the atmosphere for the sound to reach any listening ears on the ground. 

Falling space rock is relatively common. Earlier this year, a fireball lit up the skies over Ontario, Canada. Another scattered small meteorites (space rocks that reach the ground) over Mississippi. On rare occasions, meteors large enough to cause damage streak through the atmosphere. In 2013, a large fireball exploded over Chelyabinsk, Russia, blowing out thousands of windows and creating an eye-burning flash. The meteor that caused the fireball was an estimated 65 feet (20 meters) across, according to EarthSky. 

Originally published on Live Science.