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09-12-2022
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An earthquake strikes and you immediately run to observe a seismograph instrument. Three distinct squiggles, separated by time, are recorded by the instrument. These represent the sequential arrival of:
a.PâSâSurface waves (SW), because SW are fastest velocity, followed by S then P waves
b.SâPâSW, because SW are fastest velocity, followed by S then P waves
c.SWâPâS, because SW are fastest velocity, followed by P then S waves
d.SâPâSW, because S are fastest velocity, followed by P then SW waves
e.PâSâSW, because P is fastest velocity, followed by S then SW waves
f.PâSWâS, because P is fastest velocity, followed by SW then S waves

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