Disadvantages of volcano

1.Loss of life

2. Loss of property

3. Loss of homes

Case Study 1

The eruption of Mount Pinatubo in the Philippines in 1991 released large amount of ash which combined with rain water to produce a thick mudflow. The mud killed nearly 900 people and buried thousands of buildings and over 40, 000  ha of farmland in the surrounding area.THE LOCATION OF PINATUBO

THICK MUD FLOWLOSS OF PROPERTY AND HOMES

Tsunami

Volcanic eruption can also produce huge waves in the ocean called Tsunami. These waves can be destructive.

FORMATION OF TSUNAMI

TSUNAMI

Case Study 2

In 26th Dec, 2006, the earthquake was caused by subduction and triggered a series of devastation tsunamis along the coast of most landmasses bordering the Indian ocean, killing nearly 230, 000 people in fourteen countries and inundating coastal communities with waves up to 30 meters high. It was one of the deadliest natural disaster in recorded history. Indonesia, Sri Lanka, India and Thailand were the hardest hit.

TSUNAMI 2006

FORMATION OF TSUNAMI

THE FORMATION  OF TSUNAMI

Seismic disturbances, volcanic activities, submarine faulting are the main reasons for occurrence of Tsunami. A seismic disturbance can move the seawater causing a rise or fall in the level of the ocean. The seismic disturbance occurs due to displacement of tectonic plate. This rise or fall in sea water level is the early formation of a tsunami wave. This wall of water sometime turns out to be more than 100 feet height. The earthquakes that take place on the seafloor or in coastal areas usually cause tsunamis. The energy produced by the earthquake is transmitted through the water causing violent movement of sea waves.

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s