Daily Post | The Kashmir Walla » Entries tagged with "geoscience"
Landslides- II
By Afroz Ahmad Shah The famous Portuguese Bend landslide in the summer of 1956, when people noticed that the ground beneath them had begun to move, remind us of the potential of such forces to move the ground (Figure, a). It is estimated that a 105-hectare (260-acre) section of the slope was breaking free at a rate of about 2.5 centimetres per day, and also carrying Portuguese Bend with it. However, by 1961, the rate … Read entire article »
Filed under: Geoscience
Landslides- I
By Afroz Ahmad Shah Natural disasters like earthquakes, tsunamis, landslides, wildfires, cyclones, droughts, floods etc. continuously pose constant threats to our young, 10,000-years-old, civilization. The devastations of Sumatra and Thai coasts in 2004, of Kashmir and New Orleans in 2005, of southwest Java in 2006, of Sumatra again in 2007, western Sichuan and Myanmar in 2008, of Haiti in 2010, Japan, New Zealand and Turkey in 2011, brought about colossal damage in terms of death … Read entire article »
Filed under: Geoscience
Earth’s Internal Structure-II
By Afroz Ahmad Shah As I have discussed in my previous article, that through the vast amount of evidences obtained from the earthquakes waves, meteorites, which fall on Earth, magnetic fields, some rare exposures of the deeper section of the Earth’s layers, and other physiochemical properties demonstrate that Earth is made up of three major layers, the crust, the mantle and the core. This stratification within the Earth was achieved through differentiation, which is a … Read entire article »
Filed under: Geoscience
Earth’s Internal Structure-I
By Afroz Ahmad Shah The Earth’s internal structure is mostly studied through indirect means because the deepest hole though the Earth can only be drilled down to a few kilometers. This is because of the prevailing complex physiochemical conditions within the Earth and the lack of a robust scientific gear to drill down to the greater depths. This however is changing with the help of latest drilling techniques and it seems possible that within a … Read entire article »
Filed under: Geoscience
Earthquake Waves
By Afroz Ahmad Shah During any earthquake a large amount of strain energy is released, which travels as waves in all directions through the layers of the Earth, reflecting and refracting at each interface. The waves are called seismic waves or earthquake waves. These are similar to sounds waves, which are created through a disturbance in materials (media), for example when we talk to anyone, our voice disturbs the air and the energy is carried … Read entire article »
Filed under: Geoscience
Why some earthquakes lead to tsunamis?
By Afroz Ahmad Shah Some of the past earthquakes, which have been followed by tsunamis have been of the magnitude 9.0 (1952), of Kamchatka, the magnitude 9.1 (1957), of Andrean of Islands, Alaska, the magnitude 9.5 (1960) Chile, and the magnitude 9.2 (1964), Prince William Sound, Alaska. However; the scale of destruction and the damage caused by these quakes was far less than the destruction which followed the 26th December, 2004, Aceh-Andaman earthquake and its … Read entire article »
Filed under: Geoscience
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