Significant blind fault （ near vertical movement and no surface rupture ） is related to parts of the Santa Cruz Mountains and the northern areas of the Diablo Mountains and Diablo Mountains. Although these “ hidden ” faults are less known, they pose a major earthquake risk.  In a faults that people know better, as of 2014, scientists estimated that the probability of a magnitude 6.7 earthquake in the coastal Ward, Rogers Creek or St.
Within the group of “retro” style
Andreas faults is 72%, of which the special data eastern part is more likely to be The Hayward fault of the seismic bay.  The two largest earthquakes in modern history were the San Francisco earthquake in 1906 and the Loma Preta earthquake in 1989. Hydrology Main entry: A map of all water scenes in the San Francisco Bay Area Hydrology Bay Area. Water landscape maps in the San Francisco Bay area, including the Gulf and adjacent swamps, ponds and tributary bays, have complex watersheds, swamps, rivers, streams, reservoirs and bay networks, mainly flowing into the San Francisco Bay and the Pacific Ocean.
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The largest waters in the Bay Area are the mouth of the San Francisco River, the mouth of the San Pablo River and the mouth of the Suisun River. The main rivers in the North Bay include the Napa River, Petaluma River, Guarala River, Russia River, etc.; the first two flow into the San Pablo Bay, and the latter two flow into the Pacific Ocean. In the South Bay, the Guadalupe BX Leads River flows into the vicinity of Alveso in San Francisco Bay. [There are also several lakes in the 137] Bay Area, including Lake Berissa and others making lakes  and Lake Merritt.