In 1989, a major earthquake struck northern california. to locate the epicenter of the earthquake, scientists could have studied
seismographic data that was recorded in

a. one location very close to the epicenter

b. three locations, each far away from california

c. two locations, both within california

d. two locations, one within california and one elsewhere

The epicentre of earthquake could have been located by the Seismographic data that was recorded at three far away locations from California.

Thus the correct answer is Option B

Explanation:

Earthquakes are monitored by a chain of seismometers that are measured by the instrument seismometer. Seismographs are formed by a recording and a timing tool in the seismometer. This recorded graph is used to locate the epicentre of the earthquake and its nature.

This seismograph gives the graph as its output, mainly known as seismogram. It records the movement of the surface in three axes. One lies perpendicularly to the surface of Earth and the other two are parallel and all are far from California.

a and c are the answeres