What was it? A few theories are floating about:
KIRO says, “Unconfirmed reports say the large explosion may have been from a plane crash in Napa Vine.”
Meanwhile, joshtrujillo says, “Source here at Boeing Field says sound barrier might have just been broken by military planes high overhead.”
And most conclusive! KING 5 News says, “FAA confirms sonic booms from military aircraft in the area.”
As you were, everyone. Nothing to see here.

sure didn’t sound like any i’ve heard before. and that gust of wind!! knocked my friend’s fan out of her window in lacey and slammed my open doors out on cougar mtn. crazy.
It shook my house here in Columbia City.
I heard two booms in succession, then two more. Is that the way sonic booms sound? Distinct booms like that?
told ya
That’s actually pretty cool once you know it’s nothing dangerous.
Shook my house downtown. Scared me into walking back to work. Eek!
the military is protecting Obama while in town, just in case enemy fighters try to attack
@2 that’s how i heard it too, but apparently there were only two aircraft. not sure why’d we’d get 4 booms. we need a physicist up in here.
fun fact: the cracking sound a whip makes is actually a mini sonic boom!
I live in Centralia, Wa. I was sitting outside and it shook the ground. I do believe it was a sonic boom. How else could it have been heard for 100s of miles?
F- the Blue Angels!
Napavine. One word.
Fighters scrambled after flight restriction violation during Obama visit; booms reported around region
By LEVI PULKKINEN
SEATTLEPI.COM STAFF
People heard two loud booms sounds through the Seattle area and as far south as Lacey about 1:50 p.m.
A spokesman for the Federal Aviation Administration said two fighter jets were scrambled to respond to a violation of flight restrictions put in place during President Obama’s visit.
Described as a “real world mission,” a spokeswoman for 142nd Fighter Wing of the Air National Guard in Portland said the jets were launched at 1:38 p.m. Tuesday while Obama was in Seattle.
Additional details were not immediately available.
http://www.seattlepi.com/local/425231_fl…
Fucking intense….now do it again! 😀
@10– It’s precisely BECAUSE the president’s in town, apparently.
You get double booms from the nose and the tail of the aircraft.
Afterburners are fun.
Especially in protecting America from those who hate our President, our Middle Class, and our sense of fair play.
i heard it in my house tacoma i was like wtfff wos thatt
f-15s flew prtland oregon to boeing field, 180 miles, depending the version of f-15, mach 2.2 to 2.5, a 5 minute flight to cross most of the state, puts driving to shame doesnt it?
why does the military get all the fun toys! then again with the way people drive ;p
I don’t think I’ve heard a decent sonic boom since the 60’s, when the military was prone to tear-assing around the country at high speeds all the time.
@15 – thanks!