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2017/04/01 at 6:28 pm PDST

Southern Hemisphere March 2017 Background Report.

Station location

http://sccc.org.au/monitoring/Australian-Map.jpg

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

http://www.youtube.com/watch?v=qh011eAYjAA

Report

On Thursday the 30th March 2017, the Sunshine Coast Australia was bracing for a torrential downpour from remnants of ex-Cyclone Debbie. The South East was going into shut down, schools and businesses closed. As the rain fronts came down the east coast of Australia, we saw spikes in local background levels.

On the 29th, the day average was 51% above average. On the 30th when the main weather system, left over from Debbie, came through, the local background 24 hour day average spiked even more. The day average was 0.215 uSv/hr which is ~115% above average for this location!

Day average chart

http://sccc.org.au/wp-content/uploads/2017/03/Caloundra-local-average-background-radiation-levels-March-2017.jpg

What do the chart colour Alert codes mean?

http://sccc.org.au/what-does-each-step-in-the-alert-level-colour-code-mean

24 hour 60 second logging chart

http://sccc.org.au/wp-content/uploads/2017/03/Caloundra-24-hour-chart-300317.jpg

A part of this increase in background radiation level was probably caused by an increased amount of atmospheric Radon gas. More Radon gas is forced out of the ground during heavy rain events. The increase in Radon levels is seen in the live Radon monitoring chart, screen shot below. In my opinion not all this significant increase in background levels on the 30th, can be attributed to an increase in Radon levels.

http://sccc.org.au/wp-content/uploads/2017/03/ThereminoGeiger_2017_03_30_21_51_41.jpg

We had a similar rain event occur here in March 2012. These lows suck moisture in from the tropics and then bring it down the east coast of Australia.

http://www.abc.net.au/news/2017-03-29/cyclone-debbie-big-picture-view-from-space/8396684

The same advisory suggestions for March 2012 apply whenever one of these tropical rain events occur, as they did in 2012.

Report from March 5th 2012

Average background up to 8.30am 0.145uSv/Hr, 24 hr average 0.185 uS/Hr elevated – Advisory Issued
It may be wise to stay out of the rain. I am getting indoor peaks up to 0.63 uS/hr on the Geiger Counter, as this rain event moves through. It suggests it may be radioactively hotter outside. Maybe worth letting your local friends know. If you or a child gets wet in it, have a good shower when you can. I have no idea what isotopes are in the rain, only that my Geiger counter is registering 6x higher than our normal background radiation, in peaks. These peaks are only lasting for a very short period of time.

Month day average,

http://sccc.org.au/wp-content/uploads/2012/04/Caloundra-local-average-background-radiation-levels-March-2012.jpg

24 hour 60 second logging chart

http://sccc.org.au/wp-content/uploads/2012/03/24-hour-background-radiation-chart-05032012.jpg
Caloundra March month average year comparisons.

The March month average data indicates a steady in crease in Southern Hemisphere local background levels has occurred over the years, since Fukushima. If we are getting background increases here in the Southern Hemisphere, it suggests that areas in the Northern Hemisphere would be greater.

2017 38% above pre-Fukushima average
2016 39% above pre-Fukushima average
2015 33% above pre-Fukushima average
2014 31% above pre-Fukushima average
2013 32% above pre-Fukushima average
2012 24% above pre-Fukushima average

Year and month average local background radiation levels

http://sccc.org.au/yearly-average-background-radiation-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.

2017/03/02 at 4:48 pm

Southern Hemisphere February 2017 Background Report.
Station location

http://sccc.org.au/monitoring/Australian-Map.jpg
This short animation of Northern and Southern Hemisphere air circulation, shows why we can get detections so far south.

http://www.youtube.com/watch?v=qh011eAYjAA
Report for February 2017. (42% above average)

The Caloundra monthly average charts for February 2012 and 2013 showed wild fluctuations (Charts Below). Now the charts show less volatility, but the average background is higher. This suggests to me that everything is now more evenly mixed in the atmosphere. Even so, background levels have still increased. Interestingly, we had very little rain in February this year, compared to previous years.

Caloundra February month average year comparisons.
2017 42% above pre-Fukushima average
2016 41% above pre-Fukushima average
2015 30% above pre-Fukushima average
2014 40% above pre-Fukushima average
2013 39% above pre-Fukushima average
2012 37% above pre-Fukushima average

February 2017 had the highest recorded February month average background since Fukushima!

Month average chart for February 2017

http://sccc.org.au/wp-content/uploads/2017/02/Caloundra-local-average-background-radiation-levels-February-2017.jpg
Month average chart for February 2013

http://sccc.org.au/wp-content/uploads/2013/02/Caloundra-local-average-background-radiation-levels-February-2013.jpg
Month average chart for February 2012

http://sccc.org.au/wp-content/uploads/2012/04/Caloundra-local-average-background-radiation-levels-February-2012.jpg
Year and month average local background radiation levels

http://sccc.org.au/yearly-average-background-radiation-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.

BEGINNING 2017

END 2016

Southern Hemisphere Year Background Report For 2016.

Station location

http://sccc.org.au/monitoring/Australian-Map.jpg

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

http://www.youtube.com/watch?v=qh011eAYjAA

Caloundra day average chart for December 2016. (36% above average)

http://sccc.org.au/wp-content/uploads/2016/12/Caloundra-local-average-background-radiation-levels-December-2016.jpg

Caloundra December month average year comparisons.

2016 36% above pre-Fukushima average
2015 35% above pre-Fukushima average
2014 32% above pre-Fukushima average
2013 36% above pre-Fukushima average
2012 43% above pre-Fukushima average

Report:

Even thought December 2016 had a lower December month average background compared to December 2012, the 2016 year average background level was the highest recorded here since Fukushima. The 2016 year average was 25% above pre-Fukushima recorded year average. At this Southern Hemisphere location, the local year average background has seen an increase in local background levels since Fukushima (see chart below). If we are seeing a steady increase in year averages here in the Southern Hemisphere, it suggests that locations in the Northern Hemisphere are seeing much greater yearly increases.

http://sccc.org.au/wp-content/uploads/2015/05/Caloundra-yearly-average-background-radiation-levels.jpg

Year and month average local background radiation levels

http://sccc.org.au/yearly-average-background-radiation-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.

2017/02/02 at 3:04 pm

Southern Hemisphere January 2017 Background Report.

Station location

http://sccc.org.au/monitoring/Australian-Map.jpg
This short animation of Northern and Southern Hemisphere air circulation, shows why we can get detections so far south.

http://www.youtube.com/watch?v=qh011eAYjAA
Caloundra day average chart for January 2017. (42% above average)

http://sccc.org.au/wp-content/uploads/2017/01/Caloundra-local-average-background-radiation-levels-January-2017.jpg
Caloundra January month average year comparisons.
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

Report:

January 2017 saw the usual post Fukushima, seasonal increase in background level, as warmer air flows from the tropics reach this location.

Year and month average local background radiation levels

http://sccc.org.au/yearly-average-background-radiation-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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