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Southern Hemisphere, October 2017 Background Report
#1
Station locations


[Image: Australian-Map.jpg]


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






Report

Caloundra October 2017 - The elevated background level increases we are seeing in the October 2017 chart have also coincided with a significant increase in Radon detection in the local atmosphere. The amount of Radon detected locally has increased significantly since September 2017. 

In September Radon levels stayed below 0.1 pCi/l for the majority of the month.

[Image: ThereminoGeiger_2017_09_16_21_57_37.jpg]


At times in October it has reached up into 3 pCi/l.

[Image: ThereminoGeiger_2017_10_04_21_39_06.jpg]

During this period there was a high pressure system sitting between Australia and New Zealand.

[Image: Surface-wind-direction-20-10-2017.png]


It was bringing air flows from the West coast of New Zealand and the Eastern Pacific Ocean, to this location. This suggests the Radon source is from the recent volcanic activity in Northern New Zealand, and earthquake releases in the Eastern Pacific.

Local Live Radon Chart

http://liveradiationmonitoring.org/monit...OT_LOG.PNG


The recent Radon increases would have been a contributing factor to the October elevated background levels, but not the only factor.

Caloundra October month average, year comparisons.
2017    32% above pre-Fukushima average
2016    22% above pre-Fukushima average
2015    12% above pre-Fukushima average
2014    14% above pre-Fukushima average
2013    25% above pre-Fukushima average
2012    19% above pre-Fukushima average

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

[Image: Caloundra-local-average-background-radia...r-2017.jpg]

Year and month average local background radiation levels from 2007 to 2017.
http://sccc.org.au/yearly-average-backgr...ion-levels


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 here, without further research.

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#2
Nice report Vital1. Interesting that you can detect New Zealand's volcanic activity by the radon in the air. I forget about nature's contributions when faced with the man-made radioactive releases here in the Northern Hemisphere.
"The map is not the territory that it is a map of ... the word is not the thing being referred to."
 
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#3
(11-04-2017, 10:37 PM)Horse Wrote: Nice report Vital1.  Interesting that you can detect New Zealand's volcanic activity by the radon in the air.  I forget about nature's contributions when faced with the man-made radioactive releases here in the Northern Hemisphere.

The Radon detection appears to have been a precursor to the large earthquake swam that appeared off the east coast of New Caledonia, at the end of October. The wind direction seems to have been just right for me to detected the Radon increase.

[Image: New-Caledonia-earthquake-swam-November-2017.png]

Close Up

[Image: New-Caledonia-earthquake-swam-close-up-N...r-2017.png]

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