An active earthquake area and also whether you have a small earthquake you don't have the needles jump all over the place like it happens out west. out west with a big earthquake it's obvious. >> shepard: mystery solved, case closed, everybody agrees this is earthquakes. >> yes. there is one professor of earth sciences at the university of madison, wisconsin -- green bay, pardon me. steve dutch. i spoke with him earlier. he said you really have to watch your definition of earthquake. just because it was shallow, it was only three miles down, because it wasn't a very big earthquake he prefers t...