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High winds and unusually dry conditions are fueling the Los Angeles infernos

California wildfire season should be over. So why is L.A. burning?

Unusually dry conditions and hurricane-force seasonal winds are fueling multiple fast-moving and destructive wildfires in Los Angeles County. Gusts that reached over 145 kilometers per hour (90 miles per hour) quickly drove the blazes into urban areas, forcing more than 100,000 people to evacuate from their homes and killing at least 5 people as of JAn. 8.  ...

One of the big reasons the Los Angeles–area fires are growing so out of control is that Santa Ana winds are blowing across the region. These winds typically occur in the fall and winter, and they involve dry wind blowing from inland, high desert areas toward the California coast. Along the way, the wind blows over mountain ranges. As the wind descends the mountains, it becomes compressed due to the increased atmospheric pressure and warms. That in turn lowers the relative humidity of the already dry desert air, making it better at desiccating vegetation that can fuel fires. 

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Japan Questions Earthquake Forecasts

submitted by Samuel Bendett

Homeland Security News Wire - March 2, 2012

Following the massive 11 March earthquake and tsunami that rocked Japan, residents and experts there have grown increasingly skeptical of quake forecasts.

Last month two University of Tokyo seismologists released a study that predicted a major earthquake would hit Japan’s capital city within the next four years. Their study was sharply criticized by those who said their claims were likely incorrect.

Bowing to pressure, the university’s Earthquake Research Institute posted a notice on its site that stated the latest earthquake forecast was the opinion of two researchers and noted the study’s “large margin of error.”

“Many seismologists think this kind of study is too simple,” said Naoyuki Kato, a seismologist at the institute, in an interview with the Washington Post.

Japan, which has been frequently rocked by powerful earthquakes in the past, invests more money than any other nation in the world on earthquake prediction, yet despite spending more than $100 million annually, the art of predicting earthquakes remains elusive.

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