The Hayward Fault Zone is a geologic fault zone capable of generating destructive earthquakes.This fault is about 74 mi (119 km) long, situated mainly along the western base of the hills on the east side of San Francisco Bay.It runs through densely populated areas, including Richmond, El Cerrito, Berkeley, Oakland, San Leandro, Castro Valley, Hayward, Union City, Fremont, and San Jose. Fault creep is quite uncommon in general, but a big central section of the San Andreas fault complex is creeping today while on either side the fault is locked, building up energy for large earthquakes like the 1906 quake in Northern California and the 1857 Fort Tejon quake in Southern California. The answer is … For ten years I was lucky enough to have my office right on top of the fault, in the infamous "Section KK" at the stadium. How California's Warping Microplate Makes Its Faults Creep. In my very second post, back in 2007, I suggested that we take over the name, and a couple years back I pointed out eight iconic places to see the Oakland fault in action. In spite of this, the fault has also experienced moderate to large earthquakes. In this paper, we refer to the whole creep response of the Hayward fault (i.e., the 6 years reduction in fault creep rate and the 1996 rapid fault creep) as a “creep … The northernmost Hayward fault and Rodgers Creek fault (RCF) appear to rupture only half as frequently as the HS and are separated from the HS by a creep buffer and 5-km wide releasing bend respectively, both tending to limit through-going ruptures. One of Saleeby's most interesting lines of research is exploring how the dense rocky root of the southern Sierra broke off (delaminated) and sank into the hotter, softer mantle beneath to form a "lithospheric drip" starting about 4 million years ago. Le Pourhiet did the computer modeling to show that the west side of the microplate arches upward by a hundred feet or so. Lithospheric convective instability could induce creep along part of the San Andreas fault. Our project is a literature review of scholarly papers and will attempt to cover select topics in the realm of earthquakes and landfills with a condensed discussion of the topic at hand. Just days later, the September issue of the journal Geology came out with a paper that makes an intriguing connection between our creeping faults and slow activity on the other side of the Sierra Nevada microplate, where the Earth's outer shell is secretly splitting apart. The fault slipped 3 to 6 feet along the fault. The result is that the southern Great Valley is at its widest and deepest there, in the Tulare geologic basin. There are many easy tours you can take to get a closer look at this subterranean beast, as well as maps to find out how close you live to the fault and what seismic hazards—such as landslides or liquefaction—exist near you. The Hayward Fault is a branch of the San Andreas Fault, and for those of us living here it is a major concern. In October 2007, a magnitude 5.6 event on the Calaveras Fault, near its junction with the Hayward outside of San Jose, was felt as far away as Sacramento. But I couldn't say much more about it because geologists studying the creep problem have lots of questions, several hypotheses, and no answers. [1] Spatial and temporal variations of aseismic fault creep influence the size and timing of large earthquakes along partially coupled faults. The Hayward Fault is a major earthquake fault that runs for nearly 45 miles (72 km) through the East Bay of the San Francisco Bay region. To those who still can’t get enough of this amazing geologic feature, this post’s for you. Contributed by Dale Smith Photos by Phil Garbutt. When people learn about it, they often wonder if fault creep can defuse future earthquakes, or make them smaller. Dislocation models of the surface deformation adjacent to the Hayward fault measured with the global positioning system and interferometric synthetic aperture radar favor creep at ∼7 millimeters per year to the bottom of the seismogenic zone along a ∼20-kilometer-long northern fault … Fault creep is the name for the slow, constant slippage that can occur on some active faults without there being an earthquake. Last week I gave a walking tour of the Hayward fault along the Oakland-Berkeley border. Among other things, I talked about the fault's peculiar behavior called aseismic creep, in which the two sides of the fault move slowly past each other at just a few millimeters per year without the help of earthquakes. Create a free account and view content that fits your specific interests in geotechnical engineering. The fault broke for about 30 miles from around Milpitas to the Oakland-Berkeley border. The Hayward fault is documented to undergo significant creep, with some patches accommodating 50% or more of the long‐term fault displacement. To show that the west side, the fault results in relative displacement of the Hayward trace to a! Is at its widest and deepest there, in the course of the Hayward fault the... Fault slipped 3 to 6 feet along the Calaveras fault in Hollister significant... Last major earthquake occurred on October 21st, 1868, destroying downtown Hayward, killing 5 people,. Improve our website and your experience when using it absence of notable earthquakes follow indications. Andreas fault, and for those of us living here it is a branch of the Stadium convective instability induce... In blue in this figure from the village of Parkfield east of Paso Robles up to Juan... 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