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Other possibilities are,

Another source on the Australia mainland.
An event somewhere else in the World or at Fukushima.
A secret device test in Australia.

Were the Caloundra and Tasmanian detections just coincidental?

Any suggestions or relevant information regarding these detections are welcome.

————————————————————

July is winter here in the Southern Hemisphere. Since the Fukushima Nuclear Catastrophe in 2011, long term local data collection is showing an increase in winter local background levels.

Caloundra 24 hour day average chart for July 2018

http://sccc.org.au/wp-content/uploads/2018/07/Caloundra-local-average-background-radiation-levels-July-2018.jpg

Caloundra July month average, year comparisons.

2018 14% above pre-Fukushima average
2017 17% above pre-Fukushima average
2016 8% above pre-Fukushima average
2015 5% above pre-Fukushima average
2014 5% above pre-Fukushima average
2013 6% above pre-Fukushima average
2012 9% above pre-Fukushima average

————————————————————-

International Radiation Monitoring Station Updated
Sites that were no longer operating have been removed, and new monitoring stations added.

http://sccc.org.au/international-radiation-monitoring-stations

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.

Jul 16, 2018 @ 18:21

Spikes detected on Australian monitoring stations located in Tasmania and Caloundra

Very surprised to find this significant detection showing up on the Caloundra 24 hour chart for the 7th of July. There had been an up tick in background at the beginning of July compared to June 2018, but the 52% above day average detection was a shock. Wind direct at the time was from inland Australia which was also very surprising.

See Nullschool 7th July wind chart for Caloundra.

https://earth.nullschool.net/#2018/07/07/1400Z/wind/surface/level/orthographic=-217.66,-32.79,1247

Caloundra Station location:

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

Caloundra 24 hour 60 second sampling chart for the 7th July.

http://sccc.org.au/wp-content/uploads/2018/07/Caloundra-24-hour-chart-070718.jpg

A few days before the Caloundra detection, a contact in Tasmania informed me of spikes in his local background. These spikes in background in Tasmania were detected on two separate detectors. On the 4th July the Tasmanian wind direction source was also off the Australian mainland.

https://earth.nullschool.net/#2018/07/04/0600Z/wind/surface/level/orthographic=-209.76,-28.21,815/loc=146.465,4.276

Tasmania, 4th July chart

http://sccc.org.au/wp-content/uploads/2018/07/Tasmania-4th-July-2018.png

Tasmania, 6th July chart

http://sccc.org.au/wp-content/uploads/2018/07/Tasmania-6th-July-2018.png

Caloundra day average chart

http://sccc.org.au/wp-content/uploads/2018/07/Caloundra-local-average-background-radiation-levels-July-2018.jpg

What the chart colour codes mean.

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

Questions:

What is the source of these significant Australian winter detections?
Was there an event or release on the Australia mainland?
Has a significant unreported nuclear event occurred somewhere in the world?
Were these detections unrelated and just coincidental?

Suggestions and information related to these detections are welcome.

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.

2018/07/07 at 8:47 pm

Southern Hemisphere June 2018 Background Level 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

June is winter here in the Southern Hemisphere. The long term June data is showing a gradual increase in winter local background levels, since the Fukushima Nuclear Catastrophe.

June 2018 day average background chart,

http://sccc.org.au/wp-content/uploads/2018/06/Caloundra-local-average-background-radiation-levels-June-2018.jpg

Caloundra June month average, year comparisons.

2018 11% above pre-Fukushima average
2017 12% above pre-Fukushima average
2016 7% above pre-Fukushima average
2015 3% above pre-Fukushima average
2014 7% above pre-Fukushima average
2013 7% above pre-Fukushima average
2012 3% above pre-Fukushima average

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.

Jun 2, 2018 @ 18:22

Southern Hemisphere May 2018 Background Level 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

A nice quiet month without any significant background events. As most of the air flows here during this season come from a southerly direction, May local background levels were much lower than the summer months

May 2018 day average background chart

http://sccc.org.au/wp-content/uploads/2018/05/Caloundra-local-average-background-radiation-levels-May-2018.jpg

Caloundra May month average, year comparisons.

2018 12% above pre-Fukushima average
2017 7% above pre-Fukushima average
2016 12% above pre-Fukushima average
2015 4% above pre-Fukushima average
2014 13% above pre-Fukushima average
2013 7% above pre-Fukushima average
2012 7% above pre-Fukushima average

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.

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