Nature is a harsh mistress. The more we study the natural world the more we come to understand how the various natural system are inter-connected. Recently scientists from Florida International University have established a connection between large Typhoons and earthquakes. While earthquakes are a complex event with many causes this is one more piece of the puzzle that will help us understand the world we live in.
The most destructive earthquakes are the result of the Earth’s crust being made of a number of separate plates – tectonic plates – that just won’t stand still. As the plates are made of rock and earth they are rough causing friction as they grind together. This friction causes the plates to lock at the edges while the rest of the plate behind continue to move forward, building up pressure where the plates meet – convergent plate boundaries -. When this pressure is released earthquakes are the result. The amount of energy that is released during an earthquake is astronomical. The total energy released by Japans recent earthquake - total energy or seismic moment – equates to 600 million times the energy released by the Hiroshima atomic bomb. All of that energy had built in the crust and was released in just a few minutes of shaking.
“Very wet rain events are the trigger,” said Wdowinski, associate research professor of marine geology and geophysics at the UM Rosenstiel School of Marine and Atmospheric Science. “The heavy rain induces thousands of landslides and severe erosion, which removes ground material from the Earth’s surface, releasing the stress load and encouraging movement along faults.” Read the full article »»»»