2 1923 tokyo japan 105000 killed clusters of acvity

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Unformatted text preview: gs experts in geol gy, quake zone. After the Sichuan quake, 62 damaged,oTotal economic elossd$86hbillion e local histor y of RIS of the RIS issu , inclu ing c ecking th h ntal protection appealed to in other reg ions w water management and environmettp://www.internationalrivers.org/en/node/3980ith similar geolog ic environments as the Earthquake Probability §༊  §༊  §༊  §༊  Can make reasonable reliable forecasts Statement of where and how frequently an event is likely to occur and how large it is likely to be Understand tectonic environment Establish record of past events Forecas/ng Where Faults Will Move Paleoseismology Forecas/ng When Faults Will Move Seismic Gaps Migra/ng Earthquakes Recurrence Interval Times of ‘regular’ recurrence M8.2 1923 Tokyo, Japan 105,000 killed Clusters of Ac/vity, Long Intervals §༊  Earthquakes may occur in groups §༊  §༊  §༊  §༊  North Anatolian fault in Turkey Coast of northern California, Oregon, Washington and southern Bri/sh Columbia experiences major earthquakes at long intervals, with last earthquake 300 years ago Reelfoot Fault, Tennessee Wasatch Front, UT Popula/ons at Risk Popula/ons at Risk San Andreas Fault The San Francisco Bay Area §༊  §༊  Began to move 16 million years ago, has caused thousands of earthquakes Gutenberg- Richter frequency vs. magnitude rela:onship indicates that any 100 km long segment should release energy equivalent to §༊  §༊  §༊  §༊  One magnitude 6 earthquake every 8 years And one magnitude 7 earthquake every 60 years And one magnitude 8 earthquake every 700 years Many segments overdue The San Francisco Bay Area §༊  Hayward Fault splays north on east side of SF Bay through Hayward, Oakland, Berkeley §༊  §༊  §༊  §༊  §༊  §༊  M 7 earthquake on Hayward Fault could kill several thousand people, destroy 57,000 structures Rodgers Creek Fault extends north from Hayward Fault, through growing popula:ons (Santa Rosa) 1836- 1906: magnitude 6- 7...
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