Question

How many seismograph stations are used to locate the epicentre of an earthquake?

• A. $4$
• B. $2$
• C. $3$
• D. $9$

Answer 1

The correct option is C $3$

Atleast $3$ seismograph stations are used to locate the epicentre of an earthquake. We find the distance from each seismograph station to the earthquake epicenter. The interception of the three circles is the epicenter (shown as a red dot in the figure.)