ACCELEROGRAPHIC MEASUREMENTS OF THE 27 FEBRUARY 2010 OFFSHORE MAULE, CHILE EARTHQUAKE

摘要

The mega earthquake of 27 February 2010, offshore Maule, Chile with moment magnitude of 8·8 is the fi fth nlargest recorded earthquake in the world and, therefore, is considered to be a mega earthquake. This subduction ninterplate thrust earthquake occurred at the convergence of the Nazca (oceanic) plate with the South American ncontinental plate. This type of earthquake affects the north-western region of USA and Canada, as well as Alaska. nTherefore, it is important to study the characteristics of the recorded accelerograms and their effects on the future nbehaviour of tall buildings in USA. Although the earthquake produced accelerographic records with very high nground motions in terms of peak ground accelerations and very long duration of ground shaking, the observed ndamage from this earthquake was more like the level of damage expected from a moment magnitude 8⋅0 rather nthan a moment magnitude of 8⋅8. This may be the result of asperities in the fault rupture surface. Copyright © n2010 John Wiley & Sons, Ltd.