Question

During a disaster like earthquakes whom do you think should be informed first $?$

Answer 1

Hint : Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. There are four different types of earthquakes: Tectonic, volcanic, collapse and explosion.

Complete Step By Step Answer:
Animals may sense the ionization of the air caused by the large rock pressures in earthquake zones with their fur. It is also conceivable that animals can smell gases released from quartz crystals before an earthquake. So, animals are able to detect the first of an earthquake's seismic waves-the P-wave, or pressure wave, that arrives in advance of the S-wave, or secondary, shaking wave. This explains why animals have been seen snapping to attention, acting confused or running right before the ground starts to shake.
A tectonic earthquake is one that occurs when the earth's crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes.

Note :
Seismographs are instruments used to record the motion of the ground during an earthquake. Cosmic ray is also known as gamma ray. Remember, a single cosmic ray has a large amount of energy. If it collides with human DNA, it will destroy part of that DNA strand. DNA contains instructions for the cell to function properly. Hence Cosmic rays are harmful for the human body.