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Showing posts with label natural disasters. Show all posts

Sunday, March 11, 2012 ~ Have your say...

Japan: One year after the tsunami

As Japan and the world remembers the first anniversary of the crisis that transformed the nation, global attention will undoubtedly focus on the progress that the country has made in resurrecting its physical infrastructure. Restoring homes, roads, hospitals and schools, and mitigating the damage of the worst nuclear disaster since Chernobyl certainly deserve our attention and reflection. 


Still, it is important to remember that solving the social and economic problems that Japan faced before the crisis are just as critical. The unique skills that graduate programs offer will play a vital roll in managing Japan's long-term recovery. If students and professionals continue to avoid higher education, Japan will find itself ill-equipped to maintain its revival. 


Considering how many people have been displaced and how much there is yet to be rebuilt, it may be worthwhile for the Ministry of Education to encourage distance learning or online graduate programs. Because online schools are more cost-efficient, offer the ability to reach a larger audience across vast distances, and provide the opportunity to study while working full-time -- thereby avoiding the stigma of a late entry into the workforce -- they may be the perfect tool in ensuring that once Japan's physical recovery is complete, the nation will have an educated workforce capable of leading an economic recovery. 


To learn more about Japan's recovery and to see the photos that inspired the hand drawn illustrations in the video below, click the Sources button under the video. OnlineSchools.org presents Japan One Year Later Japan One Year Later You may also like to read the science behind the earthquake and tsunami.

Video courtesy Peter Kim and http://www.onlineschools.org/japan-one-year-later/

Tuesday, March 15, 2011 ~ Have your say...

Earthquakes and Tsunamies Explained

The recent earthquake and tsunami in Japan provide us with a stark reminder of nature's raw power.  Earthquakes, while geologically fascinating, are one of the Earth's most destructive forces.  Livescience.com and Graphic.Is have provided several infographics which illustrate how earthquakes and tsunamies work.


The magnitude 8.9 quake that hit 80km off the coast of Sendai, Japan,  was caused by one plate slipping under (subducting) another.  As one plate moves beneath the other, the upper plate undergoes compression, causing a bulge.  Over time, this stress increases until eventually, the bulge collapes, releasing huge amounts of energy.  If this happens under the ocean, a huge amount of water is displaced, creating waves that travel very fast (around 500miles per hour).  Still, whether or not a tsunami occurs depends on the strength of the earthquake,  the direction of the tremblor's motion, and the seafloor topography.  At sea, the wave may appear small, but as it approaches land and the water becomes more shallow, the same volume of water tries to move forward - so the wave grows in size (vertically) and eventually crashes in on the land.

For a detailed explanation, please view the infographics below (click them to see the large versions).

Graphic 1:  How Tsunamies Occur (image credit: Graphic.Is)

Graphic 2:  Anatomy of An Earthquake
(image credit: Graphic.Is)
So, can we predict earthquakes?  Not really.  According to Keith Sverdrup, a professor of geophysics at the University of Wisconsin-Madison, "Earthquake prediction is something we haven't really been able to master yet.  With earthquakes, the best we can say is these are areas where earthquakes are likely to occur and this is our best estimate of the statistical probability of an earthquake of a certain size happening within a certain period of time."  We're just not there yet.  Hopefully, the science and technology will improve so that an early warning can be provided to people before a disaster of this magnitude hits.

With respect to the Japan quake, you can help by providing information about someone who may have been involved with the disaster using Google's Person Finder.  Also, you can donate online or with your mobile phone by visiting the Red Cross website.

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