After three years of research, confirming and adjusting Lawson, Boatwright has accomplished his assignment. He’s created a digital shake map of the 1906 earthquake. On a map of Northern California, he has placed tiny squares. Each square has an intensity rating of one to 10. By clicking on one particular square, you can see, for instance, that Graton (near that cemetery) has an intensity rating of 8 to 9. Nearby Sebastopol was given the highest shaking rating for this quake, 9 1/2.