© Who Forted?
They showed up this week in Oklahoma, were then recorded in Massachusetts, and one reader even reported them in Indiana, but it seems that the "Mystery Booms" are still going strong with new reports coming out of the West Coast.

The first new set of strange explosions were heard in Weber County, Utah last night around 9:00 PM, prompting hundreds of concerned citizens to phone the local authorities. Interestingly enough, when Fox 13 News rang up the University of Utah to check in with the Seismograph department, they claimed that while there were no earthquakes to speak of, they did pick up some unidentified "sonic activity" around the time the booms were reported.

One resident believed that the noises were related to aircraft:
Sonic booms. They're not supposed to break the sound barrier of the continental U.S., but they did so. I know they're doing some night training over the West Desert because I saw a string of tracers being fired high in the sky tonight, about 10 or 11 o'clock. Way out west of Skull Valley.
The local Hill Airforce base, on the other hand, claims that they had no aircraft in the air after 6:00PM. Likewise, the National Guard stated that had no weapons training that day, while the ATF told reporters that there were not rocket tests that day either. Hrmm..

Eric Anderson believes the noises were coming from none other than Area 51, but that we shouldn't start blaming the extraterrestrials:
The Area 51 guys could also be playing around with their latest hypersonic gadgets. (NOT "aliens". Area 51 is an actual air base where they test things they won't officially talk about for another 10 years or so.)
The next reports of strange booms in the sky came from North Hollywood, California at 9:30PM. The LA Times blog reported that folks first thought the noise had emanated from a North Hollywood metro station, but as of now the source of the explosion is still unknown to authorities.

"Seriously, any leads what the hell this boom was in North Hollywood? Im shook up a bit" tweeted @RajRawal37

Maybe it was just The Last Exorcism 2 (for real?) sucking at the speed of sound.

Have you heard any mysterious booms in your neck of the woods? Let us know! Tweet us @whoforted or drop by our Facebook page with your story!