Earthquake Presentation - POwer point.pptx

An earthquake is a natural phenomenon characterized by the sudden shaking or trembling of the Earth's surface, caused by the release of energy stored in the Earth's crust due to tectonic plate movements. This release of energy occurs when accumulated stress along geological faults exceeds the strength of the rocks, resulting in a rapid displacement of the Earth's crust. Earthquakes can vary in magnitude from minor tremors that are barely perceptible to catastrophic events capable of causing significant destruction and loss of life. The intensity of an earthquake is measured using the Richter scale or the Moment Magnitude Scale, which quantify the energy released. Earthquakes can trigger secondary hazards such as tsunamis, landslides, and aftershocks, amplifying their impact. They can occur in any region but are most common along the boundaries of tectonic plates, where the Earth's crust is most active. Understanding earthquakes and their behavior is crucial for improving building practices, emergency preparedness, and mitigating the risks associated with these powerful natural events.

1. CRUST MANTLE CORE

2. TECTONIC PLATES

3. PLATE BOUNDARIES

4. Seismograph IT MEASURES HOW STRONG THE EARTHQUAKE IS. INTENSITY MAGNITUDE

5. The strength of an earthquake is expressed in two ways INTENSITY MAGNITUDE

6. INTENSITY It measures the amount of damaged caused by the shaking at a particular location caused by an earthquake. It is determined by observing the effects of the earthquake in different places. This includes: Houses Buildings Structures What people saw How people feel What people did

7. Intensity vary depending on where you are from the epicenter. Expressed using Roman numerals (I, II, III) Uses Modified Mercalli Scale and Rossi-Forel scale 1 . 2 . 3 . INTENSITY

8. EPICENTER IV III II I INTENSITY

9. MAGNITUDE It measures the amount and duration movements of energy released by an earthquake. Uses moment magnitude scale or Richter scale The same number no matter where you are or what the shaking feels like. Uses Hindu - Arabic numerals (2,3,4,5) 1. 2. 3.

10. MAGNITUDE

11. EPICENTER 5.0 5.0 5.0 5.0 MAGNITUDE

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13. FAULT A fault is the break or fracture in the earth’s crust. It is a surface or narrow zone along which one side has moved relative to the other. Usually occur along plate boundaries and it causes earthquake

14. Faults are classified into two ACTIVE FAULT INACTIVE FAULT ON

15. ON INACTIVE FAULT Studying the vibration, past and present that come from faults. Observing surroundings ACTIVE FAULT Moved within the last 10,000 years Do not show signs of earthquake within 10,000 years Checking the country's historical records

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