This has some interesting comments about the phenomena of illumination
associated with earthquakes.

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Anchorage Daily News | Quaking lights
Scientists drawn to legends of luminous displays that precede temblors
By Alberto Enriquez, Anchorage Daily News
http://www.adn.com/life/story/753386p-803392c.html
Published: January 21, 2002
When it comes to earthquakes, the earth doesn't just move. It often roars.
It broadcasts at radio frequencies. And if the conditions are right, it even
produces a visible glow.
So-called "earthquake lights" are nothing new. The Greek historian
Thucydides wrote that "immense columns of flame" foretold the destruction of
two ancient cities, Helice and Burls, by earthquake. Far across the ancient
world, the author of a traditional Japanese haiku recorded:
The earth speaks softly
Read the full story online at
http://www.adn.com/life/story/753386p-803392c.html

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