Answer
$3.162$ times stronger
Work Step by Step
The relative strength is equal to $$=10^{M_2-M_1}$$ Plugging in values of $M_1=5.3$ and $M_2=5.8$ yields $$=10^{5.8-5.3}=10^{0.5}=3.162$$ Therefore, the waves are 3.162 times stronger.
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