The disasters that are existing or occurring in outer space beyond a planet, especially away from the planet Earth are called as extra terrestrial or extra planetary disasters.
2. EXTRA PLANETARY DISASTERS
• The disasters that are existing or occurring in
outer space beyond a planet, especially away
from the planet Earth are called as extra
terrestrial or extra planetary disasters.
3. EXTRA PLANETARY DISASTERS
• The extra planetary disasters is caused by
collision of celestial bodies and resultant
falling of debris on the earth’s surface. The
examples of extra planetary disasters are
magnetic storms, catastrophic earth changes,
meteorite impacts and impact from near
earth objects.
4.
5. GEOMAGNETIC STORMS
• A geomagnetic storm (commonly referred to as a
solar storm) is a temporary disturbance of the
Earth's magnetosphere caused by a solar wind
shock wave and/or cloud of magnetic field that
interacts with the Earth's magnetic field. The
increase in the solar wind pressure initially
compresses the magnetosphere. The solar wind's
magnetic field interacts with the Earth’s magnetic
field and transfers an increased energy into the
magnetosphere.
6.
7. GEOMAGNETIC STORMS
• During the main phase of a geomagnetic storm,
electric current in the magnetosphere creates a
magnetic force that pushes out the boundary
between the magnetosphere and the solar wind.
The disturbance in the interplanetary medium that
drives the storm may be due to a solar coronal
mass ejection (CME) or a high speed stream (co-
rotating interaction region or CIR) of the solar
wind originating from a region of weak magnetic
field on the Sun's surface.
8.
9. EFFECTS OF GEOMAGNETIC STORM
• Disruption of electrical systems
• Communications
• Navigation systems
• Satellite hardware damage
• Mains electricity grid
• Geologic exploration
• Pipelines
• Radiation hazards to humans
• Effect on animals
10. METEORITE IMPACTS
• Meteorites are naturally occurring objects in
space which are generally remnants of
asteroids and comets. They have been
categorized into three types,
• 1. Stone Meteorites
• 2. Iron Meteorites
• 3. Stony-iron Meteorites
11.
12.
13. Contd…
• When such extra planetary objects strike the
earth’s surface, then it forms a bowl- shaped
depression with a raised on the following
factors, size of the impacting object, velocity
of the impacting object and angle at which
the object strikes like earth’s surface.
14. Effects of meteorite impacts
The effects of an impact of a large extra terrestrial
object on the earth’s surface are,
• Massive earthquake
• Widespread wildfires
• Blocking of solar radiation due to large quantities
of dust in the atmosphere.
• Decrease in the rate of photosynthesis in plants
leading to disruption of all ecosystems.
• Acidification of water
