EducTech

Post on 06-Dec-2014

211 views 1 download

Tags:

description

 

Transcript of EducTech

Earthquake

What is an Earthquake?

Also known as quake, tremor or temblor

It is a sudden release of energy in the Earth's crust that creates seismic waves.

Seismic Activity

Also known as seismicity or seismism.

It is the frequency, type and size of an earthquake experienced over a period of time.

Seismometers

Instrument used to measure an earthquake.

Fault is a planar fracture or discontinuity

in a volume of rock, across which there has been significant displacement along the fractures

Epicenter is the point on the Earth's surface

that is directly above the hypocenter or focus, the point where an earthquake originates

What causes an earthquake?

Rupture of geological faults Volcanic activity Landslides Mine blasts Nuclear tests

What are the effects of an earthquake?

What are the effects of an earthquake?

Shaking and ground rupture Landslides and avalanches Fires Soil liquefaction Tsunami Floods Human impacts

How to survive an earthquake?

Prepare Be calm

How to survive an earthquake?