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Disaster Reduction Resource Manual
vi Disaster Risk Reduction Resource Manual Disaster Risk Reduction Resource Manual vii Message The Philippines is considered one of the most disaster-prone countries. Every year, storms, fl ash fl oods, landslides, earthquakes, and volcanic activi-
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www.mit.edubasic physics for seismology 33 Therefore, in the first-order assumption, dui = ∂ui(x) ∂xj dxj 1 2 ∂ui ∂xj ∂uj ∂xi dxj + 1 2 ∂ui ∂xj ∂uj ∂xi dxj 1 2 (ui,j +uj,i)dxj + 1 2 (r⇥u⇥dx) i =(eij +wij)dxj,(1.4) where wij is a rotational translation term (diagonal term is zero, wij = wji).Then eij = e is the strain tensor, which contains the spatial derivatives of the ...
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