tsuanme

TSUNAMI - DISASTER MANAGEMENT
i n t r o d u c t i o n
definition - A tsunami (from Japanese: 津波, "harbor wave") or tidal wave, also known as a seismic sea wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Tsunami waves do not resemble normal undersea currents or sea waves because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide. For this reason, it is often referred to as a "tidal wave".
causes - These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When the ocean floor at a plate boundary rises or falls suddenly, it displaces the water above it and launches the rolling waves that will become a tsunami. Tsunamis may also be caused by underwater landslides or volcanic eruptions. They may even be launched, as they frequently were in Earth’s ancient past, by the impact of a large meteorite plunging into an ocean.
h i s t o r y / p a s t a t t a c k s
+ On November 1, 1755, a series of earthquakes destroyed Lisbon, Portugal, setting off fires and building collapses. An hour after the quake struck, a 15 m (50 ft) tsunami caused the death of 60,000 people.
+ On August 27, 1883, the Indonesian volcano, Krakatoa, erupted; causing tsunamis that killed 37,000 people on Java and Sumatra.
+ In 1896, a series of tsunamis in japan killed 27,000 people and destroyed more than 10,000 houses. tsunamis struck hawaii and alaska in april 1946, claiming 159 victims.
+ On May 1960, a series of earthquakes in Chile caused tsunamis that killed nearly 1500 people. The same wave hit Hilo Hawaii later in the day and claimed 61 victims. The same tsunami hit Japan the next day and killed 150 more.
+ On December 26, 2004, in Sumatra, Indonesia, the biggest tsunami occurred on the Indian ocean. To this date, this tsunami is the biggest and the deadliest that ever struck and was caused by the second deadliest earthquake ever. The magnitude recorded was 9.3 and the waves were as high as 80 feet.
c o n t e n t
20 facts about tsunamis
+ An underwater earthquake, a volcano eruption or a landslide mostly causes a tsunami.
+ Only on very few occasions, a tsunami is caused by a giant meteor in the ocean.
+ Tsunami waves can be as huge as 100 feet.
+ About 80% of the tsunamis occur in the Pacific Ocean’s Ring of Fire.
+ Tsunami is also commonly known as killer waves.
+ The tsunami that occurred in December 2004 in the Indian Ocean is known to be the most powerful earthquake that has occurred till date.
+ The Indian Ocean tsunami of 2004 had an epicenter of 9.0 magnitude and it killed over 216000 people in 14 countries.
+ The Indian Ocean tsunami of 2004 hit 11 countries from Thailand to Africa.
+ Tsunamis are the most common in Japan, and off-late they have to spread to many other countries.
+ The length of a tsunami as long as 100 kilometers and the distances of a continually occurring tsunami can be as far as 1 hour.
+ Scientists believe that in the year 1700, a tsunami of magnitude 9 occurred in the Pacific Ocean in the northwest and caused massive flooding and damage in Japan.
+ Tsunamis can travel as fast as 5000 miles per hour, without being noticed and can cross the entire ocean in less than a day.
+ A Tsunami can be even less than 30 centimeters in height an can pass of unnoticed.
+ Tsunami waves get stronger as they succeed and not usually the first hit is that impactful as the succeeding ones.
+ Tsunamis can travel up to the speed of 500- 800 kilometers per hour.
+ The Indian Ocean tsunamis waves have always been 30 feet and above.
+ Flooding caused by the tsunami on the mainland can be more than a thousand feet.
+ The places with the greatest risk of a tsunami are Washington, Oregon, Hawaii, Alaska, and California.
+ One should not swim in the tsunami water as the current is always pulling the person in the opposite direction.
+ Tsunamis are always high on energy and can travel miles across any ocean.
p i c t u r e s
c o n c l u s i o n
tsunamis can be extremely dangerous and deadly. as we do not have the power to control or predict and detect tsunamis because they are underwater waves they become even more difficult to escape. tsunamis can damage a lot of property and life and usually have a panic for the human basic necessities. so they are not a thing to be taken lightly.