An Earthquake Has a Period Of $\frac { 1 } { 2 }$

Multiple Choice

An earthquake has a period of $\frac { 1 } { 2 }$ second, and an amplitude of $500,000$ micrometers. Find its measure on the Richter scale.

A) $3$
B) $2$
C) $5$
D) $6$
E) $8$