Question

question 81
three seismograph stations (1, 2, and 3) record an earthquake. a researcher plots circles on a map using the records of the seismograph stations as shown in the image. he labels the points on the intersections of the circles as p, q, r, and s.
which letter represents the location of the epicenter of the earthquake?
a p
b q
c r
d s

Explanation:

Step1: Recall the method of locating earthquake epicenter

The epicenter of an earthquake is located at the intersection point of the circles drawn from three seismograph stations (using the distance from each station to the epicenter as the radius).

Step2: Identify the intersection point in the image

Looking at the given image, the point \(O\) is the common intersection point of the three circles (from station 1, station 2, and station 3).

Answer:

B. \(O\)