The Secret Service interviewed the pilot believed responsible for the breach after he landed the float plane at Kenmore Air Harbor, at the north end of Lake Washington.

SLIDESHOW: Sonics Booms Shatter Windows

Family members of the pilot, Charles Lee Daily told KIRO 7 Eyewitness News that he and a woman had just returned home from a trip to Lake Chelan and were unaware of the flight restrictions for the President's visit.

The passenger in the Cessna 180 float plane, Laura Joseph, of Normandy Park told the Associated Press she saw an F-15 fighter jet pass their plane once but did not realize what was going on until she and Daily got out of the plane and were told the Secret Service wanted to talk with them.

WATCH IT: Interview With Pilot's Relatives

The sonic booms from the F-15 military jets scrambled after the airspace violation shook a wide area of Western Washington, rattling windows and nerves from Chehalis to Seattle.

The North American Aerospace Defense Command said the jets were scrambled from Portland after a report that an aircraft violated the restricted airspace. The Air National Guard stationed in Portland is the primary air defense force in the Pacific Northwest.

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Spokesman John Cornelio told The Associated Press the aircraft left the restricted area before the Air National Guard jets arrived, and there was no intercept.

The Secret Service told CBS News the small private seaplane was eight miles away from Air Force One and that it appears to have flown into the restricted space by mistake.

Emergency agencies across the region got calls from numerous people who heard and felt a double boom about 1:50 p.m.

The 911 system was down in some areas of Pierce County for about an hour after the booms because of a flood of calls, said Ed Troyer of the Sheriff's Office.

"Many house and car alarms have been set off that we will not be able to respond to," Troyer wrote in an email.

Viewers from Tacoma, Des Moines and Alki, among other places, told KIRO 7 Eyewitness News they felt the booms.

Here at KIRO 7, two sets of rumbles shook the building at Third Avenue and Broad Street in Belltown.

Outside the Westin hotel in downtown Seattle, where the president was appearing, many people felt the booms, said KIRO 7 Eyewitness News reporter Essex Porter.

"Though some too excited to notice. I heard/felt 1 boom then siren blast then bigger boom," Porter wrote in a tweet.

"From Obama event at Westin, mystery boom felt like it came from Westlake Center a few blocks south. Was surprised to see no smoke after boom," he wrote.