Sources close to Kate Gosselin tell us she was the one who called the cops last night after she and Jon got into a blowout.

Police arrived to the Gosselin's Pennsylvania home shortly after the call was made.

Cops told us they were only at the residence for around 10 minutes -- long enough to make everyone take a chill pill.

Kate eventually left the property to stay at a nearby Days Inn Hotel, because it was Jon's turn to watch their litter.