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Lecture

ARH306Y1 Lecture Notes - Philippine Sea Plate, Pacific Plate, North American Plate


Department
Archaeology
Course Code
ARH306Y1
Professor
All

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Japan!is!probably!the!most!dangerous!place!on!the!rim!
o Lies!at!the!intersection!of!4!major!plates!
o On!the!right!is!the!pacific!plate!
! Moving!to!the!east!
! Deep!water!trench!where!the!plate!is!pushing!down!below!
Japan!
o Philippine!plate!south!of!Japan!
! Pacific!plate!is!moving!underneath!it!
! Philippine!plate!in!turn!is!thrust!under!Japan!
o On!the!left!of!Japan!there!is!a!poorly!defined!plate!margin!between!the!
Asian!plate!(on!the!left)!and!the!North!American!plate!(to!the!right)!
! Boundary!runs!up!through!Honshu!and!Yamata!basin!
Tokyo!is!right!at!the!intersection!of!all!4!plates!
Last!March!pacific!plate!was!locked!
o Earthquake!was!caused!by!the!sudden!slippage!of!this!plate!into!the!
subduction!zone!
Subduction!process!produces!a!lot!of!friction!
Plate!margins!lock,!buildup!of!stress!over!100!years,!sudden!unlock!marks!
earthquake!
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