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Prepared and Presented by B.V.S.VAMSINADH 15331D8703 M-tech Structures
Case Study on Nepal Earthquake
What is an Earthquake? Causes of Earthquake? Types of zones How we measure earthquake? Introduction to Nepal earthquake Loss of life and property Disaster Risk Profile Relief and Rescue Operations
Contents:
What is an Earthquake?
An Earthquake is caused by a sudden Slip on a fault.
The tectonic plates are always slowly moving, but they get stuck at their edges due to friction.
When the stress on the edge overcomes the friction, there is an earthquake that releases
energy in waves that travel through the earth's crust and cause the shaking that we feel.
What is Focus, Epicenter of an Earthquake??
Epicenter:
The point on the Earth's surface located directly
above the focus of an earthquake.
Focus:
The location where the earthquake
begins. The ground ruptures at this
spot, then seismic waves radiate outward in all
directions.
Causes of Earthquake
Some major causes of
earthquake is
Surface Causes Volcanic Causes Tectonic Causes
Types of Zones Earthquake zoning map divided into 4 Seismic zones
Zone IntensityZone V Very High Risk Zone
Zone IV High Risk Zone
Zone III Moderate Risk Zone
Zone II Low Risk Zone
How are Earthquakes measured?
The Richter Scale:
• There are a number of ways to measure the magnitude of an earthquake.
• First widely used is Richter Scale.• Developed by Charles F. Richter in
1934.
Introduction to Nepal Earthquake:
Main Shock:•Date : 25April2015•Origen Time: 11:56hrs•Magnitude: 7.8•Depth : 8.2Km•Areas Affected: Nepal, India, Bangladesh,
China
Aftershocks: •Date: 12May2015•Magnitude: 7.3
Casualities:Country Death Injuries
Nepal >8,900 >22,300India 78 560China 25 380
Bangladesh 4 200Total 9010 23400
Economic loss Loss approximately equal to 25% of Nations GDP
damaged more than 700,000 homes and other structures.
Nepal is ranked as 11th most risk country in world in terms of relative vulnerability to earthquake & 30th with respect to flood
50% of bridges and narrow roads unusable because of damage and debris
40% of electricity lines and all substations non functional for a month
Disaster Risk Profile
This earthquake, the worst quake to hit Nepal since
1934
• Nepal remains as one of the global hot spots
• For natural disaster (world bank,2005 )
• Entire Country Falls under High earthquake intensity belt- Seismic Scale
Katmandu Durbar Square
Relief and Rescue
Operation Maitri:
Operation Maitri (English: Operation Amity) was a rescue and
relief operation in Nepal by the
government of India and Indian armed
forces in the aftermath of the April
2015Nepalearthquake
13 NDRF teams of about 500 persons on ground are helping the
victims
22 tonnes of food packets and 120
large oxygen cylinders have been moved to disaster-struck
Nepal.
8 Tonnes of Baby food and skimmed
milk and 2 Tonnes of
biscuits and other material for children.
741 Nepalese have been
rescued by IAF helicopters.
99 tonnes of engineering equipment's have been
transported to the affected
areas.
Things India has done to help during Nepal Earthquake???
thankq