Earthquake in Ontario?

Okay, so the building shook a mite this afternoon. Heidi was on the couch, watching soccer. She thought I was pushing the couch. Then, an e-mail from our daughter, in Texas. "Did you have an earthquake?" Huh? In Ontari-ari-ari-O? Impossible! Now I discover there are (gasp!) fault lines running through the Province. So I check out the location of earthquakes, worldwide. Mamma mia! They is here, too! I larn something every day ...