Dr. K C Trikha and N K Sehgal Solutions for Chapter: Earthquakes, Exercise 1: Something To Know

An earthquake, of magnitude $2.5$on Richter Scale, cannot be recorded on a seismometer.

In highly seismic areas, it is better to have house made from mud or timber, than those made by using heavy construction materials.

The minor quake, that might occur before the main earthquake, is known as a—

A natural phenomenon, whose triggering is not associated with an earthquake,is-

Earthquakes occur when there is a sudden release of stored up energy in earth's-

The various layers of earth are marked as A, B, C and D as shown in the given figure.

The correct labelling, of these layers A, B, C and D of earth, is—

The epicenter of an earthquake is—

The magnitudes of two earthquakes, A and B, on the Richter Scale, were $7$ and $5$, respectively. The strength of—