This includes Cripple Wall Retrofits, No Cripple Wall Retrofits, Retrofits of Homes with Living Area above a Garage, and Hillside Home Retrofits, THE SAN ANDREAS FAULT IS QUITE DANGEROUS AND CAN CREATE AN EARTHQUAKE 8.0 OR MORE ON THE RICHTER SCALE. The 1906 San Francisco earthquake is estimated to have been in the 7.8 range (and possibly even larger.) Along the San Francisco peninsula no detectable slip occurs (less than 1.5 mm/yr) at the surface, but appreciable strain is accumulating. At that location, the record is about 1000 years long, and in that time period, there are about 9 large earthquakes recorded in the sediments, including the 1857 rupture. Scientists say the region appears to be overdue for a significant quake. The San Andreas and Cascadia fault have a potentially deadlier counterpart lurking in the East Bay region of Northern California. The Hayward Fault is 40 miles long and about 8 miles deep and trends along the east side of San Francisco Bay. The Hayward Fault Zone is a geologic fault zone capable of generating destructive earthquakes. The San Andreas Fault is locked in many places; much of its energy is released in the form of earthquakes. Its notoriety comes partly from the disastrous 1906 San Francisco earthquake, but rather more importantly because it passes through California, a highly-populated state that is frequently in the news.And with many research institutions dedicated to studying such an accessible fault, the SAF has become a household name. Its last major rupture occurred in 1868, during California's frontier days, and was the original "Great San Francisco Earthquake" until 1906.. Many earthquakes have occurred along it, including famous ones in 1857, 1906 and 1989. The relative motion between these two tectonic plates is 50 mm/yr (about 2 inches/yr), but that rate is distributed across all the faults that are part of the SAFZ. Running for nearly 74 miles through cities including Fremont, Hayward, Oakland, Berkeley, and Richmond, the Hayward Fault has the potential to wreak more havoc than most California faults. Fault-plane reflections reveal that two of these faults, the San Andreas and Hayward, dip toward each other below seismogenic depths at 60?? Map of faults in northern California. The Hayward fault is a 90 kilometer long crack in the Earth's crust that travels through the San Francisco Bay area. The Maacama fault is the northward continuation of the Hayward-Rodgers Creek fault system in northern California. Using the forecasts, we can properly engineer structures, plan for earthquake response, and be prepared at home to make a big difference in the impact of a significant earthquake. The city of Ukiah, in Northern California sits right next to the Maacama Fault, which is capable of M=7.5 earthquakes and poses a significant threat to the region. The Hayward fault in the San Francisco Bay area runs through a densely-populated area, so it has been studied quite a bit.The most recent major earthquake on this fault was approximately M6.9 and occurred in 1868. Many smaller faults branch from and join the San Andreas fault zone. Comparing the data from sites like Wrightwood and Frazier Mountain, earthquake scientists are working to understand the pattern of large earthquakes – asking questions such as how typical was the large (M7.9) earthquake in 1857? First, let's zoom out and look at the big picture. HAYWARD FAULT RUNNING THROUGH CENTER OF UC BERKELEY SPORTS STADIUM.. MOVEMENT OF EARTH SHOWING HOW EARTHQUAKES DAMAGE HOUSES. This means that earthquakes as large as M=7.4 are possible on both sides of San Francisco Bay, rather than just on the San Andreas, as we had thought before. 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