A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.5 x 10^2 um. Find this earthquake's magnitude. (round to one decimal point.)
correct number and symbol
5.5 x 10^2 µm
M˅L = log˅10(A) + 3.0*log˅10(D) - 3.38 .... ˅ means sub = log˅10(5.5*10^2/1000) + 3.0*log˅10(300) - 3.38
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