Cafe RadLab

Full Version: Southern Hemisphere January 2018 Background Report
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Station location

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This short animation of Northern and Southern Hemisphere air circulation, shows why we can get detections so far south.

Caloundra 2nd January 2018 - Another massive Radon spike was detected and reached up to 10 pCi/L. At the peak of this spike it was very humid, but not raining, and the local Radon monitor was in a wooden building with the door and some windows open. Under these environmental monitoring conditions, this is a very large spike in local Radon levels. The wind direction during the event was from the tropics.

Radon Event Chart:

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Caloundra January month average, year comparisons.

2018    45% above pre-Fukushima average
2017    42% above pre-Fukushima average
2016    41% above pre-Fukushima average
2015    40% above pre-Fukushima average
2014    41% above pre-Fukushima average
2013    52% above pre-Fukushima average
2012    43% above pre-Fukushima average

On the 15th January there was a marked drop in background levels, as the wind direction changed to a Southerly from the Southern Ocean. This dynamic has been constant since Fukushima. Whenever Southern Ocean air flows reach this location, we get a significant drop in background levels.,4.276

January 2018 day average chart, (What the bar chart colour codes mean.)

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Cairns North Queensland January background Report - Fairly flat, the little spikes were coincidental with some thunderstorms and good rainfalls.

The Cairns monitoring station has two GammaScout Geiger counters.

[Image: Cairns-January-2018.jpg]

Year and month average local background radiation levels from 2007 to 2018.

Disclaimer: This is an amateur volunteer run service. Human error can provide incorrect information, and equipment malfunction can produce false readings. Do not rely on, or take action upon information presented on this web site, without further research.