Earthquakes
EarthquakesEarthquakes are shaking or vibration of theearths crust. They make the land move andthe effects of earthquake v...
Major Earthquakes
The Ten Largest Earthquakes Since 1900Location Date Magnitude1. Chile ...
1906 San FranciscoThe San Francisco earthquake of 1906was a major earthquake that struck SanFrancisco, CA and the coast of...
Predicting EarthquakesBecause of their devastatingpotential, there is great interest inpredicting the location and time of...
Earthquakes proof structureAn earthquake-proof building is abuilding that has been built to survive anearthquake. The buil...
Primary and secondary waves Primary waves are longitudinal waves that push and ...
Created by- sarim anjum Class-X b roll no- 22• Under the noble guidence of – P S Topo mam.
Created by- sarim anjum Class-X b roll no- 22• Under the noble guidence of – P S Topo mam.
of 10

napsetr-earthquake

Published on: Mar 3, 2016
Source: www.slideshare.net


Transcripts - napsetr-earthquake

  • 1. Earthquakes
  • 2. EarthquakesEarthquakes are shaking or vibration of theearths crust. They make the land move andthe effects of earthquake vary upon themagnitude and intensity. Earthquakes occurevery now and then all round the world,except in some place places whichearthquakes occur rarely. The devastation ofcities and towns is one of the effects ofearthquake. Landslides and Avalanches arecaused by movement of earthquakes. Hugerocks come tumbling down the mountainssometimes blocking the path of rivers. Thiscan cause floods. Houses are broken downby earthquakes. A huge Tidal wave calledTsunami which is derived from a Japaneseword Tsu meaning harbor and Nami meaningwave. These tidal waves from the seatowards the land causing huge floods.
  • 3. Major Earthquakes
  • 4. The Ten Largest Earthquakes Since 1900Location Date Magnitude1. Chile May 22, 1960 9.52. Prince William Sound, Alaska March 28, 9.2 19643. Andreanof Islands, Aleutian Islands March 9, 1957 9.14. Kamchatka Nov. 4, 1952 9.05. Off western coast of Sumatra, Dec. 26, 2004 9.0 Indonesia6. Off the coast of Ecuador Jan. 31, 1906 8.87. Rat Islands, Aleutian Islands Feb. 4, 1965 8.78. Northern Sumatra, Indonesia March 28, 8.7 20059. India-China border Aug. 15, 1950 8.610 Kamchatka Feb. 3, 1923 8.5 .
  • 5. 1906 San FranciscoThe San Francisco earthquake of 1906was a major earthquake that struck SanFrancisco, CA and the coast of NorthernCalifornia at 5:12 A.M. on Wednesday,April 18, 1906. The most widely acceptedestimate for the magnitude of theearthquake is a moment magnitude. At the time, 376 deaths were reported; the figure was fabricated by government officials who felt that reporting the true death toll would hurt real estate prices and efforts to rebuild the city
  • 6. Predicting EarthquakesBecause of their devastatingpotential, there is great interest inpredicting the location and time oflarge earthquakes. Although a greatdeal is known about whereearthquakes are likely, there iscurrently no reliable way to predictthe days or months when an eventwill occur in any specific location. In the past there have been many earthquakes that led to massive loss of life and property, and they all struck with little or no warning. Japan has probably the most advanced earthquake detection system in the world, yet was caught completely unawares by the Kobe Earthquake of 1995.
  • 7. Earthquakes proof structureAn earthquake-proof building is abuilding that has been built to survive anearthquake. The building is built withspecial technology that has materialsmade in earthquake areas. No building,however, can be made 100% safe andbuilding earthquake proof structures tobe more effective is just trial and error.
  • 8. Primary and secondary waves Primary waves are longitudinal waves that push and pull the earth. They are the fastest body wave, averaging speeds of about 6 km/s, so arrive first.Secondary waves are transverse waves,which make the earth shake from side to side.Slower than Primary waves, they average about4 km/s so arrive second.
  • 9. Created by- sarim anjum Class-X b roll no- 22• Under the noble guidence of – P S Topo mam.
  • 10. Created by- sarim anjum Class-X b roll no- 22• Under the noble guidence of – P S Topo mam.

Related Documents