Hi DH. The dilational strain meter Petra referred to is in the Fremont area. There are no crustal deformation sites north of San Pablo Bay. At least none that I know of. There is one at Saint Vincent College in San Rafael. A miniPBO (plate boundary observatory) was supposed to be installed in the Wild Cat Canyon area south of Petaluma but USGS ran out of money before they could do it. Take Care…Don in creepy town

• Crustal Deformation Sites