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This came out in May. I just saw it.
http://arxiv.org/abs/1105.2841
There were interesting signals in the atmosphere that peaked just 3 days before the earthquake struck.
Apparently the deep rock layers around the fault show they are stressed by releasing radon gas, which has a detectable influence on the atmosphere. The decay of radon causes condensation of water vapor, which causes heating (measurable) above where the quake was going to occur.
And the density of electrons in the ionosphere increased, above where the epicenter would be when the quake occurred, three days before.
The MIT Tech Review had a wider-audience piece about this:
http://www.technologyreview.com/blog/arxiv/26773/
http://arxiv.org/abs/1105.2841
There were interesting signals in the atmosphere that peaked just 3 days before the earthquake struck.
Apparently the deep rock layers around the fault show they are stressed by releasing radon gas, which has a detectable influence on the atmosphere. The decay of radon causes condensation of water vapor, which causes heating (measurable) above where the quake was going to occur.
And the density of electrons in the ionosphere increased, above where the epicenter would be when the quake occurred, three days before.
The MIT Tech Review had a wider-audience piece about this:
http://www.technologyreview.com/blog/arxiv/26773/