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Unformatted text preview: Hayward 22:11 Topographic map view – contours of equal elevation Geologic evidence shows that the Hayward Fault is a major fault • Abandoned tails (eg Strawberry Creek) show progression of the Hayward fault • Can estimate slip rate o Offset: 335 m o Age of Channel: 32000 years old o Long-term slip rate: 10 mm/year o 10 mm/yr is 20% of total Pacific-North American Plate Boundary (50 mm/yr) • Large M7.0 earthquake in Hayward – first after the gold rush o Extent of Rupture of 1868 didn’t reach Berkeley part of fault o 300 years since eq near Berkeley o Paleoseismology: geology and fossil record to determine when earthquakes happened in the past o Inflexion in Northern Hayward golf course o No big quakes since 1868 – no moderate quakes in 100 years Something unique? Steady progression not associated with an eq But 2.5 mm/yr •...
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This note was uploaded on 10/12/2008 for the course EPS 20 taught by Professor Allen during the Fall '08 term at Berkeley.
- Fall '08