EARTHQUAKE DOWNTOWN LA

Earthquakes are evidence that tectonic plates that are scraping against each other, sending energy rippling out though the earth's crust and rumbling the ground we walk on. They happen often in Los Angeles, i've learned, at least five big ones in the two years ive lived here. It always feels like a semi-truck is barelling down my driveway. Any one else feel it? Im still not used to them.