natural disasters are very dangerous

1. NATURAL DISASTERS
By; devina vinay and anwita vinay

2. • When our life is in harmony with nature , things seem to be smooth and pleasant.
When living things on earth become victims of nature’s fury we say that a natural
disaster has happened. Natural disasters may destroy a part of life and property.
Some such disasters which might affect our lives are earthquakes , volcanoes , tidal
waves and drought.

3. EARTHQUAKES
Earthquakes are measured using observations
from seismometers. The moment magnitude is the most
common scale on which earthquakes larger than
approximately 5 are reported for the entire globe. The
more numerous earthquakes smaller than magnitude 5
reported by national seismological observatories are
measured mostly on the local magnitude scale, also
referred to as the Richter magnitude scale. These two
scales are numerically similar over their range of validity.
Magnitude 3 or lower earthquakes are mostly almost
imperceptible or weak and magnitude 7 and over
potentially cause serious damage over larger areas,
depending on their depth. The largest earthquakes in
historic times have been of magnitude slightly over 9,
although there is no limit to the possible magnitude.
Intensity of shaking is measured on the modified Mercalli
scale. The shallower an earthquake, the more damage to
structures it causes, all else being equal.[1]

4. VOLCANOES

5. VOLCANOES
• A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava, volcanic ash, and gases to escape from a magma chamber below
the surface. Earth's volcanoes occur because its crust is broken into 17 major, rigid
tectonic plates that float on a hotter, softer layer in its mantle.

6. TIDAL WAVES

7. TIDAL WAVES
• A storm surge, or tidal surge, which can cause waves that breach flood defences. A
tsunami, a series of water waves in a body of water caused by the displacement of a
large volume water, although this usage of "tidal wave" is not favored by the
scientific community because tsunamis are not tidal in nature.

8. DROUGHT

9. DROUGHT
• A drought is a period of below-average precipitation in a given region, resulting in
prolonged shortages in its water supply, whether atmospheric, surface water or
ground water. A drought can last for months or years, or may be declared after as
few as 15 days.

10. •THANK YOU