Question

Where a major earthquake has happened in the past, but not in a while, is called a seismic _____.

A.gap
B.wave
C.fault
D.scale

Answer 1

It is called a seismic gap.

A.

Answer 2

Seismic gap

Step-by-step explanation:

Seismic gap is defined as the section of faults which produce an earthquake about a long time ago but now it is not quite active.

Historically, there is no earthquake observed for some seismic gap but there is some belief that the segment of faults can produce earthquake on the basis of information of plate-motion or measurement of strain.