Earthquake -Presentation. Civil Engineering.

1. A SEMINAR
ON
- EARTHQUAKE
GOVT POLYTECHNIC. HARAPANAHALLI.
NAME : ABDUL TAYASH. K.
BRANCH : CIVIL ENGINEERING.
SEMESTER : 5TH
REG.NO. : 173CE19001.

2. - CONTENT :
1. INTRODUCTION.
2. TYPES OF EARTHQUAKE.
3. TYPES OF SEISMIC WAVES.
4. EFFECTS OF EARTHQUAKES.
5. CONCLUSION.

3. • WHAT IS EARTHQUAKE ?
>> An EARTHQUAKE is the result of a sudden release of energy in the
earth’s crust that creates seismic waves.
>> The seismic activity of an area refers to the frequency and size of
earthquakes experienced over a period time .
For Example :
If you throw stone in a pond of still water , series of waves are
produced on the surface of water these waves spread out in all
directions from the point where the stone strikes the water..
Similarly , any sudden disturbance in the earth’s crust may
produce vibration in the crust which travel in all direction from point of
disturbances.

5. TYPES OF SEISMIC WAVES.
1. Primary waves (P – waves)
2. Secondary waves (S -waves)

6. ● EFFECTS OF EARTHQUAKES :
1) Soil Liquefaction.

7. 2) Human Imapact.

8. 3) LAND SLIDES.

9. 4) FIRES.

10. 5) T – Sunami.

11. 6) FLOODS.

13. Conclusion
⊙ Earthquakes are an unavoidable natural force of
destruction. Earthquakes mainly occurs along plate
boundaries and we can make generalizations, or “forecasts “
of where they will occurs, but not when. Engineers are
constantly working to design earthquake resilient
structures, and to retrofit older buildings.