What is a Tsunami?

 What are Tsunamis?

On Boxing Day 2004 a horrific wave swept across the Indian Ocean killing over two hundred and thirty thousand people. After receiving massive media coverage, the topic of Tsunamis became widely discussed for a time before dying down. However, this topic of discussion returned abruptly in March 2011 when a Tsunami devastated the Japanese East Coast. But what are Tsunamis? What causes them?

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How to Survive an Earthquake

 Survive an Earthquake

Before An Earthquake

Long before an earthquake hits, make a plan for your family as to where everyone should go and where to meet afterwards. Decorate your home appropriately by not hanging heavy mirrors or pictures over sleeping areas in bedrooms or behind couches, in case they are shaken off the wall. Stock up on earthquake emergency food supplies, including extra batteries, battery operated radios, flashlights, blankets, extra water and canned food and medical supplies. It is a good idea to stock tools to turn off gas and water valves as well as the electricity.

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Earthquakes in Japan

 Earthquakes and Tsunamis in Japan

When the blocks of earth slip past each other on a fault line on land it is called an earthquake. When the blocks of earth skip past one another on a fault line in the ocean it is still considered an earthquake, but this type of earthquake can cause a Tsunami. In March of 2011 a giant earthquake hit Japan and then created a Tsunami that killed thousands of people and cause billions of dollars in property damage.

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Location of upwelling in Earth’s mantle discovered to be stable

A new study shows that large-scale upwelling within Earth’s mantle mostly occurs in only two places: Beneath Africa and the Central Pacific. These upwelling locations have remained remarkably stable over geologic time, despite dramatic reconfigurations of tectonic plate motions and continental locations on the Earth’s surface. The study describes a plate tectonic “quadrupole,” which defines two points of “net convergence” and two points of “net divergence” of tectonic plate motions.
Source: http://www.sciencedaily.com/releases/2013/06/130626142936.htm

Seismic gap outside of Istanbul: Is this where the expected Marmara earthquake will originate from?

Earthquake researchers have now identified a 30 kilometers long and ten kilometers deep area along the North Anatolian fault zone just south of Istanbul that could be the starting point for a strong earthquake. The group of seismologists say that this potential earthquake source is only 15 to 20 kilometers from the historic city center of Istanbul.
Source: http://www.sciencedaily.com/releases/2013/06/130618113717.htm

‘Caldas tear’ resolves puzzling seismic activity beneath Colombia

Colombia sits atop a complex geological area where three tectonic plates are interacting, producing seismicity patterns that have puzzled seismologists for years. Now seismologists have identified the “Caldas tear,” which is a break in a slab that separates two subducting plates and accounts for curious features, including a “nest” of seismic activity beneath east-central Colombia and high grade mineral deposits on the surface.
Source: http://www.sciencedaily.com/releases/2013/06/130606101728.htm

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