Update: 6/19/12, 7:00 P.M: - Radiation Detection in Wisconsin
Starting this afternoon, local time, a recent Monitoring Station in Frederic, WI detected an elevated level of radiation. The reading just barely surpassed 100 CPM for only a minute, more than twice normal background, but that maximum reading was at the apex of a classic ebb and flow pattern often associated with a passing radioactive system. In fact, there were scattered thunderstorms in the area, along with a flash flood watch.
Logistically, the Frederic station is operating the Inspector EXP, the external probe version of the popular Inspector model, built around the same ultra-sensitive, pancake-style Geiger-Mueller tube. On top of that, the Frederic station is continuously monitoring outdoors.
The photo shows the setup that he designed and that is still under construction.
An acrylic tube extends out from the wall of his house, and inside it, you can see the external wand or probe of the EXP, protected from rainfall, but able to "sniff" the air passing between the open chimney and "intake" holes on the underside of the opposite end of the acrylic tube. The temporary red, protective cap over the end window of the GM tube is removable for alpha detection. The probe is connected by cable to the survey meter safely inside the house, which is in turn connected to the computer.
Because of that, the rest of us on the network we were able to receive immediate early warning of, and to study this detection in real time.
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