The grounds of the U.S. Geological Survey (USGS) in Menlo Park were filled today with all varieties of emergency response personnel and vehicles, part of San Mateo County’s Disaster Prepardedness Day. Whether your concern was fire, earthquake, flood or terrorism, you could get your questions answered and buy various kits that could get keep your household going in the wake of a disaster. Most of the equipment was available for inspection inside and out, a hit with the kids in attendance. Also a crowd favorite was the 8.0 earthquake simulator (pictured above), a kind of ride that gave participants a “this-is-what-it-feels-like” thrill. While there, we spotted a representative of the unsung post- disaster heroes, press photographers, who are also among the first responders. San Francisco Chronicle photographer Paul Chinn (pictured) covered many a Southern California brush fire before moving north not long before the Loma Prieta earthquake. And he’s still at it, although today’s assignment was considerably less risky!