Staci Addison of Wichita was on the top floor of a 1 1/2-century-old, five-story building in downtown Philadelphia when the earthquake hit on Tuesday.
"It was just creaking and cracking and kind of moaning," she said. "There was no doubt in my mind that it was an earthquake. And I had never been in earthquake before."
Addison said she spends nine days a month in Philadelphia in her capacity as a fund-raising consultant.
She said she was sitting at a desk talking on the phone when the lamps in her room started shaking and the curtains started swaying.
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At first, she said, she thought the rumbling was being caused by a passing truck. When the rumbling didn't stop, she immediately knew that it was an earthquake.
"There was just no doubt what it was," she said. "There was nothing else it could be."
Addison said the building was briefly evacuated, but everyone was allowed back inside after it was determined that there were no gas leaks.
She said she wasn't exactly scared during the 60 or so seconds of rumbling.
"Scared? That may be a little strong," she said. "I was just kind of amazed.
"It's kind of like the first time you go on a ride, and you don't know whether to be thrilled or scared."
Addison said she still doesn't know whether it's better to be on the top floor or the bottom floor of an old building during an earthquake.
"I know what to do in tornado — you go to basement," she said. "I don't know what precautions you take in an earthquake."