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ch. 19 vocab

Vocabulary

TermDefinition
stress is the total force acting o crustal rocks per unit of area
strain deformation of materials in response to stress
elastic deformation caused when a material is compressed bent or stretched
plastic deformation when stress builds up past a certain point called the elastic limit
fault fracture or system of fractures along which earth moves
seismic waves the vibrations of the ground produced during an earthquake
primary waves squeeze and push rock in the direction along which the waves are traveling
secondary waves named with respect to their arrival times
focus where points originate
epicenter surface waves originate from the epicenter and spread out
seismometer rotating drum covered with a sheet of paper
seismogram the motion of the mass in relation to the frame is when registered on the paper with the recording tool
richter scale devised by a geologist named charles richter
magnitude numerical rating system that measures the energy of the largest seismic waves
amplitude numbers in the richter scale are determined by the height
moment magnitude scale rating scale that measures the energy released by an earthquake
modified mercalli scale rates the types of damage and other effects of an earthquake as noted by observers during and after the occurrence
soil liquifation seismic vibrations can cause the ground to behave like a liquid in a phenomenon
tsunami large ocean wave generated by vertical motions of the seafloor during an earthquake
seismic gaps sections located along faults that are known to be active.
Created by: donaldorodriguez
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