Question

Buildings collapsed at the foothills of the himalayas because of an earthquake. Before collapsing they were moving forward and backward

Answer 1

Answer:

Here is ur ans

Explanation:

Buildings collapsed at the foothills of Himalayas because of an earthquake, but before collapsing they were moving backward and forward because in hilly areas there is always rearrangement of earth plates under hills. ... When a part of the earth crust between two falls is lifted, it forms a block mountain.

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Answer 2

Answer:

It happened because of primary waves.

Explanation:

Primary or ‘P’ waves are the first ones to reach the surface of

the earth after the energy is emitted in the earth’s interior.

1) They travel at a very fast speed from the focus of the earthquake in

a radial direction.

2) Subjected to a P wave, particles in the rock move in the direction

of waves, to and fro.

3) The wave moves to and fro, therefore these waves are also called

forward-backward waves.