The Concord Fault, which runs through Bay Area neighborhoods in Concord and Walnut Creek is in a different location than previously understood. It could produce a major earthquake in the Bay Area.

This paper addresses with the problem of contour line reconstruction extracted from scanned topographic maps since contour lines play a significant role on construction of Digital Evaluation Models ...

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The blaze was initially reported to be about 80 acres but quickly grew. In a matter of about four hours, the Ranch Fire had grown to 2,000 acres and then doubled in size to more than 4,200 acres ...