That wasn't a truck rumbling by. It was a 4.0 magnitude earthquake centered 1.86 miles north of Yorba Linda.
The earthqauke hit at 8:17 p.m.
Let us know if you felt it.
Find out what's happening in Diamond Bar-Walnutwith free, real-time updates from Patch.
Get more local news delivered straight to your inbox. Sign up for free Patch newsletters and alerts.
We’ve removed the ability to reply as we work to make improvements. Learn more here
