KNTV NBC Bay Area News At 6 January 5, 2018
Feel the jolt and the back and forth shaking motion. And the number one reason reason is of course that it was shallow. But the second thing we look at is the shallow nature allows the primary and secondary energy waves to travel farther reaching more of the bay area. And thats why so many of us had the perceived notion that it was higher than 4. 4 magnitude. Lets look at the primary and secondary waves. Primary waves usually arrives first hence the name. This travels lieu rock and water. Thats what arrives in the big boom first experienced all the way down to san jose. We had reports of that....