Geol 240 Dolan James 2012 Fall Week 6 Lecture 11 October 4 Announcements Lab Quizzes started so make sure to attend all your designated labs Get ready for the midterm A midterm copy from 1999 will be available online on Blackboard It is about 60 questions Study strategies Will include m c questions and true false Take your time and read through each question carefully Do your pre lab so you can be ready for the quizzes No specific questions on dates so you do not have to memorize dates but do know the details of earthquake Bring a pencil no Scantrons will be supplied for you Don not go through your notes and study directly from reading Go through your notes and you think of a question and make up your own question Midterm is Tuesday October 9 2012 Study session is Monday at VCK 101 with the professor at 6pm Outline of Last Lecture I Basin and Province II Western Boundary the East Side of the Sierra Nevada III Constellation of GPS Satellites IV San Andreas Fault and Wasatch V Basin Range VI Major Earthquakes and their magnitudes VII Alquist Priolo Special Studies Zones Act SSZ Act Outline of Today s Lecture I San Andreas Fault Continuation II In depth explanation of the earthquake III San Haciento and Elsenor IV Owens Valley Earthquake V Dead Valley VI Eastern California Sheer Today s Lecture The san Andreas fault is the dominant fault San Andreas proper and the Hayward fault These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute The San Andreas transform fault system began about 28 million years ago with the collision of the Pacific plate and the North American plate This collision caused the subduction zone along the coast to cease and the two plates began to slide past each other The Pacific plate moves northwest relative to the American plate a system referred to as a right lateral fault Major historic earthquakes in California 5 Major strands of the san Andreas system picture About 35 of earthquakes every other fault rest is SAF We are overdue waiting for the big earthquake it should be every 100 years we are 158 years overdue Fault scarp insert picture rupture right u up to the border and really stressed out San Jacinto and Elsenor The 2010 el mayor earthquake 1872 Owens valley earthquake magnitude Huge disagreements on how big it was estimates 7 4 to 8 0 some people suggested it was bigger than 1906 Eastern California sheer o N S zone of Rl s s faults o 1992 M 7 3 launders o 1999 Mw 7 1 hector mine California s state mineral u know it s a mineral when it ends in ine 1872 earthquake of thee notion of standing under a door adobe brick building typically only the doorways are left Owens valley fault mainly right lateral strike slip Death valley Bad water basin The san Andreas fault in SoCal Its parallel the motion of plates the blocks are moving parallel Drawing of San Andreas Fault mismatch in the middle where the part of Southern Cali is being squeezed An additional component of N S shortening The SSZ Act was signed into law in California following the 1971 San Fernando earthquake The Act requires that 1 The California State Geologist compiles and published map delineating active faults zones called Special Studies Zones of California 2 The local governments regulate constructions within the Special Studies Zones and prohibit building construction for human occupancy across an active fault trace 3 Prospective buyers of any real property located within the Special Studies Zones must be notified of the fact by the sellers or by their representing brokers