Yes I've seen this one before.

Very very interesting document. Almost every entry was described as strong to moderate. And they were occuring like once a week! It would be so interesting to know the exact magnitude and locations of all of these events. Based on these entries it would seem most of them were 4+. Could you imagine the havoc on the bay area in today's age if there were a 4+ event every couple of days? Perhaps thats the future if history is any gauge.