As part of this project, that tunnel – the Claremont Tunnel – was seismically retrofitted. Large liquid storage tanks are protected by berms that are designed to contain the contents should a tank fail under normal conditions. If the 1868 rupture on the southern Hayward fault extended southward along the Mission Seismic trend, it might have included Zone VI or perhaps triggered aftershocks on Zone VI. In June 2006 Bay Area Rapid Transit (BART) management announced that they have elected not to modify the Berkeley Hills Tunnel, which actually penetrates the Hayward Fault, arguing that it would be cheaper (and less disruptive to current operations) to rebore a misaligned portion after the fact than to protect riders (either by extensive modifications of the tunnel or by replacing it with a higher bore) against the small likelihood that a train (or two) would crash into or be cut in two by a major slippage of the fault. Calaveras Fault hit with nearly 40 aftershocks after 5.6 quake BAY AREA REASSESSING RISK: Likelihood of a larger quake increased, but energy seems to be directed away from dangerous Hayward They do warn that all residents of the region should be prepared for a large event and its subsequent effects (e. g., lack of water, firefighting, first aid, electricity, motor and heating fuels, etc.) Funding and organization for a permanent exhibit at this location is being actively sought, with planning in progress. At depth, the Hayward fault merges smoothly into the southern part of the Calaveras fault, and the two may rupture together in a larger earthquake than either could produce alone. Creep damage to asphalt road surfaces will usually appear as a series of echelon cracks. The red line is the newly discovered surface trace connecting the southern end of the Hayward Fault to the Calaveras Fault, once thought to be an independent system. Extensive additional interpretive material concerning the geology and seismology of the Bay Area was presented for viewing, most of which is currently accessible online. The same may be true for the Rodgers Creek fault to the north. "The Hayward Fault: America's Most Dangerous? Dismantling of high pressure and temperature process units and the consequent fire danger to personnel and equipment could produce substantial economic consequences for the western states. [9], The Calaveras Fault is continuous from the Sunol area south to Hollister. The designed slip margin has been reduced by half due to unforeseen settlement of the tube structure. It was long believed that there was no connection between the Hayward Fault and the Calaveras, but geological studies[10] (particularly the examination of very small and deep earthquakes) suggest that the two may be connected. Relocated events on the Hayward and Calaveras faults in particular, have been especially revealing and suggest that at seismogenic depth the Hayward fault is the major northward extension of the Central Calaveras fault (Manaker, Michaels, and Burgmann, 2003), rather than the Northern Calaveras fault. Highways 80 and 880 and the Port of Oakland. The most dangerous fault in the Bay Area is, as of now, due to fail at any time. Aviation fuels are piped from these same refineries to the Oakland Airport. an offshoot of the San Andreas Fault, near Hollister, south of the Bay Area. To the east of the Hayward-Rodgers Creek fault, the Calaveras fault extends 123 km (76 mi), splaying from the San Andreas fault near Hollister and terminating at Danville at its northern end. The last large event was the 1984 Morgan Hill event and the last moderate earthquake was the 2007 Alum Rock event. Shown in the shake intensity maps shown below. ) of the eastern span was completed in August 2013 a... 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