1Tectonic MechanismsEarthquakesReadingChapter 8: 241-245Chapter 7: 187-196World Series Earthquake apartment buildingPortland 2006 November 5Magnitude 2.6TimeMonday November 6, 2006 at 05:34:35.69 Z (UTC) Sunday November 5, 2006 at 09:34:35.69 PM (PST) Distance from3.1 km SW of Portland, OR 28.3 km N of Canby, OR 34.9 km NE of Newberg, OR Coordinates45.516 deg N122.648 deg WDepth16 kmQualitygood (BA)http://www.ess.washington.edu/SEIS/EQ_Special/WEBDIR_06110605343c/welcome.htmlName of Event File: 06110605343cEarthquake ReportMagnitude 2.6, SW of Portland, OR Sunday November 5, 2006 at 09:34:35.69 PM (PST) Portland 2006 November 6 seismographhttp://www.pnsn.org/WEBICORDER/PNSN/MCW_SHZ_UW.2006110600.htmlSeattle, WA• Feb 28, 2001, Nisqually quake rocked the Central Puget Sound region • 6.2 Richter Magnitude • 6.8 Moment magnitude• Centered 57.5 km south-southwest of Seattle and 52.4 km deephttp://128.205.131.100:591/archives/Seattle.htmlhttp://www.scec.org/earthquakes/1906 San Francisco fire2Focus, epicenter, fault Orange grove offset, So CalBefore deformation StrainRelease of strain After strain released3Summary of elastic reboundSan Andreas Fault SystemSeismographSeismogram showing seismic wavesP-waves P-waves4S-waves S-wavesS-type surface waves Ocean-type surface wavesSummary of seismic wavesSeismic wave travel time curves5Difference of P and S wave travel timeMercalli scaleRichter magnitude determined by seismic wave recording on a seismogramEarthquake magnitudes and expected worldwide
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