Contents: >Introduction to Earthquake. >Causes of Earthquake. >How the Ground shakes? >Effects of Earthquake on Structures. >Examples. >Relationship & world wide distribution of earthquake and volcanoes. >Earthquake and Bangladesh.

1. Presented by:
Md. Inzamul Haque Sazal
Dept. of Geography & Environment
Shahjalal University of Science & Technology, Sylhet-3114
Bangladesh.

2. Contents:
 Introduction to Earthquake.
 Causes of Earthquake.
 How the Ground shakes?
 Effects of Earthquake on Structures.
 Examples.
 Relationship & world wide distribution of earthquake and
volcanoes.
 Earthquake and Bangladesh.

8. Examples of Some Destructive Earthquake

9. Earthquake & Volcanism

The planet Earth comprises irregular shaped
and varying sized plates, which constantly
move at different speeds. To be precise, the
plates drift over the mantle layer of the Earth.
Consequently, magma is generated along the
plate boundaries.
When the plates collide, move apart or
slide each other, it leads to generation and
accumulation of pressure (strain), which
when released causes earthquakes. The
strongest earthquakes are manifested during
the plate collision, while the slowest
earthquakes are observed when plates move
apart from each other.
Similar to earthquakes, volcanism or
volcanic activity is observed when the plates
are divergent (move apart) or convergent
(move towards each other). In such plate
movements, the magma present in the plate
boundaries may rise to the Earth's surface,
leading to volcanic eruptions.. Divergent
plates may cause long volcanic rifts, whereas
convergent plates result in individual
volcanic eruptions.

10. WORLDWIDE DISTRIBUTION OF EARTHQUAKE AND VOLCANIC ZONES
The close relationship between earthquakes and volcanic outbursts is evident from the maps
depicting the locations prone to both phenomena. If you compare the maps that illustrate
earthquake zones and volcanic zones, you will find them matching to each other. The main theory
behind both these natural calamities lies in the plate tectonics.

11. Volcanic Monitoring: Associated
Earthquake activity

12. Earthquake Prone areas of
BANGLADESH

14. Interesting facts about Earthquakes in Bangladesh

15. THANK YOU.