Date of publication: 2017-08-26 05:32
The Deep Ocean Assessment and Reporting System (DOARS) will be set up six kilometers deep under the sea. It will have pressure sensors to detect the water movement. The sensors will be linked to the satellite that will relay information to the earth station. Some 6-67 more sensors would be installed later and the data buoys would be linked to the system that would record changes in the water level.
All three kinds can be detected and recorded by sensitive instruments called seismographs. A seismograph is usually anchored to the ground and carries a hinged or suspended mass that is set into oscillation by ground movement during an earthquake.
Circum-Pacific Belt Surrounds the Pacific Ocean and accounts for more than three-fourths of the world 8767 s earthquakes. Sometimes called the 8766 Ring of Fire 8767 , its epicentre are the coastal margins of North and South America and East Asia. These represent the eastern and western margins of the Pacific Ocean respectively. The occurrence of maximum number of earthquakes in this region is due to four ideal conditions—
Some measures to prevent building collapse during the earthquake are: symmetry and rectangularity of building symmetry in locating openings simplicity in elevation or avoidance of ornamentation intersecting internal walls so as to divide the total plan in square enclosures of not more than 6 m wide use of steel or wooden dowels going into walls meeting at corners (shear walls) or T-junctions to provide effective bonding use of bond beam or band of reinforced concrete at lintel levels of openings and serving as lintel too. The last one is the one feature that is most effective in ensuring the integrity of enclosures like a rigid box.
While millions of Tsunami survivors throughout South Asia and East Africa have escaped the horrors of major epidemics of communicable diseases in the immediate aftermath of the disaster, affected communities still face enormous challenges including the continued looming of well-documented health threats and psychological traumas from the loss of loved ones. In addition, further earthquakes and tsunamis remain a possibility as confirmed by the continuing seismic activity in Indonesia - the 78 March quake affecting Nias and neighbouring Islands off Sumatra, and the daily aftershocks.
There is a direct correlation between higher human development and higher preparedness. The countries which have lesser human development are more vulnerable to risks of disasters and damage. Of all the disasters, floods are the most common followed by wind storms, droughts and earthquakes. But the drought is the deadliest disaster which accounts for 98 per cent of all deaths from natural disasters. The highest numbers of people die from disasters in Asia. India, China and Bangladesh are the worst affected countries by flood. Besides the natural disasters, transport accidents and technological disasters are also faced by the developing countries.
After the initial cost of rescue operations there is the clean up cost. Debris from the destruction caused by the tsunami needs to be cleaned away. Damaged buildings that are no longer structurally safe may need to be knocked down.
The converging mass of air gains a rotary motion because of what is known as the Coriolis force caused by the rotation of the Earth. However, under favourable circumstances, such as high sea-surface temperatures, this low pressure area can get accentuated.
Rehabilitation is an integral part of disaster management. When disasters occur administrative measures are terribly inadequate and perhaps this is the most difficult period for a victim. The role of administration does not end with end of disasters. In fact its effort and commitment get more complex. It requires proper coordination among various agencies. In this context it is very important to note that disasters are non-routine events that require non-routine response. Government cannot rely on normal procedures to implement appropriate responses- the rescue teams require learning special skills, technologies and attitudes in dealing with disasters.
For measurement of the intensity of an earthquake, the Modified Mercalli Intensity Scale is used. The 67-point Mercalli scale measures the intensity of shaking during an earthquake and is assessed by inspecting the damage and interviewing survivors of the earthquake. As such, it is extremely subjective.