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October 16, 2009

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New Madrid isn't the only place in the midwest where you can find evidence of past liquefaction.

This publication has some nice pictures of old sand boils:
http://pubs.usgs.gov/of/1998/of98-488/

Erik - thanks for the link. Yes, there are many other locations where liquefaction features are testament to the history of seismicity and enable reconstruction of prehistoric events. The publication has some great images.

Also what I didn't mention is that there are other ways in which sand blows can originate and there is some debate around the possibility of alternatives to earthquakes for the origin of some of them.

New earthquake.
What a disaster.A lot of inocent people can be in danger.

http://www.viewheadlines.com/News/Article.aspx?i=9879&t=Strong-quake-hits-Indian-islands

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