(Go here for the latest daily local background radiation levels and advisories for 2014)
December 2012 ( Month average 0.143 uSv/hr, 43% above year average )
Alert Caloundra report 26th December. Light drizzle this morning, first rain here in weeks. A rain swab test was 1.2 uSv/hr. It was taken from the bonnet of a car. The wind direction was from west south west. I am getting similar test results to the Nimbin monitoring station at present. Running a 12 hour decay test chart using the Theremino Geiger software, and a SBT-10 pancake probe.
Alert Nimbin Monitoring station report 26th December. "Rain arrived last night and left a large bump on yesterdays chart. Rain continued to now so I just went out and took a swab off the car that measured ~1.4uSv/h. I had a blip on my newer GS early yesterday afternoon. Alarm, that was set for 0.5uSv/h, went off but by the time I got to it there was nothing exciting going on. It didn't show up in the log either."
Alert Nimbin Monitoring station report 20th December. "Just took a swab from the car windscreen after 30mins of rain and measured 3.4uSv/h (one minute count). I also took a swab off the same windscreen when the rain started and measured 1.7uSv/h Background up slightly."
Sydney report 15th and 16th December. "Hi Peter, My counters are beeping more than usual today. They are going up 0.25uSv/h frequently. Please find attached images. In my counter, 100 CPM means 0.5uSv/h. High readings have been confirmed by my other counter. So, it's the true thing. Given numbers are 1 minute average. Please keep me informed," Chart for the 15th and chart for the 16th.
Alert Nimbin Monitoring station report 9th December. Just had a small rain shower here and I took a not too thorough swab from a clean sheet of corro, 1700x850mm, proped up on 4 star pickets in the center of a large area of lawn. Initial readings over 4.8uSv/h! Took another swab this morning and tested it w/ LND 7317, and was seeing over 3.0uSv/h (Ra226 calibration) then ~ 2.1uSv/h on the minute counts.
Alert Nimbin Monitoring station report 3rd December. Pretty serious Radon washout here in NE NSW Australia at the moment. Over 2.6uSv/h being measured from small rain samples. And the rain continues…..After 20mins of rain a quick swipe (not thorough) Fast result screen showed 2.6 - 2.8uSv/h.
New Zealand North Island 2nd December. I think this would have to be the biggest spike I have seen at this North Island of New Zealand private monitoring station. See screen shot in case you missed the live event. They are using a scintillator for monitoring purposes, so it is normal at this station to have an average around the 750 CPM, from my observations, over time. Cloud flow at the time. Kapiti Gaigakaunta Monitoring station, http://zl2tod.net/gaigakaunta/?story=19 A contact on the South Island also reported elevated Radon levels being detected at the same time.
November 2012 ( Month average 0.131 uSv/hr, 31% above year average ) (Detailed November Report)
Alert Nimbin Monitoring station report on the 28th November. Currently raining here in NE NSW Australia. Just took a swab off the car windscreen. Geiger counter started squeeeeling as I approached, and now says 1.67uSv/h with the swab up close. I am logging counts each minute to follow decay, hopefully down to normal background. That's a LOT of (potential) radon progeny.
Email Advisory Issued, 27th November. On the 25th November, the day background average again hit 40% above average. This is the third time this month. It is suggested that during these elevated background radiation events, if it rains, you keep children and pets out of the rain, plus re-divert rain tank inflows. If you use tank water have a good carbon based water filter, or equivalent in place.
Rain swab testing in different locations is showing higher levels of Radon washout during rain events, that coincide with elevated background events. Radon has always been part of our environment, but levels appear to be increasing. Radon washout decays very quickly.
Traditionally here, we have had a much lower background average than the USA. This means we can detect much smaller changes compared to a location with higher background. Even with our present higher detections it is still lower than the Australian (0.17 uSv/hr) and USA (0.34 uSv/hr) average. The Japanese average was 0.081 uSv/hr before Fukushima. Background levels could have been much lower everywhere before the advent of the nuclear age.
Email Advisory Issued, 18th November. It is suggested that during these elevated background radiation events, if it rains, you keep, children, and pets out of the rain, plus re-divert rain tank inflows. Here is the 24 hour background chart for the 17th. Here is a Radon washout test swab chart collected from the edge of a passing storm, at around 10.45 pm on the 17th November. (Full Report)
Nimbin Monitoring station report on the 17th November. "Took a swab from the windscreen half an hour ago after many showers, and measured more than 650cpm(SBT10) throughout the first 10 mins."
October 2012 ( Month average 0.119 uSv/hr, 19% above year average ) (Detailed October Report)
October 24th Well that continuing strong southerly that came through on the evening of the 22nd, caused a dramatic drop in the 24hr average background level for the 23rd.
October 23rd The 22nd 24 hour average was 0.145 uSv/hr (45%) above the 4 year average of 0.10 uSv/hr. Also, on the morning of the 22nd between 12am and 8am it was 48% above average. A very strong Southerly came through at around 8pm last night, so I expect today's average to be lower.
October 18th Note: Lots of rain swab tests have been conducted over the last month using Gamma scintillator based test equipment. What has been detected at present is a significant increase in radioactive Radon gas in the atmosphere, when Northerly air arrives in the area. Other radioactive isotopes that could be atributed to the Fukushima nuclear disaster have not been detected in this series of tests. Go to "The Food Lab" to see the charted test results for these tests.
October 13th There has been a dramatic drop in the 24hr background average with the arrival of southerly cold front.
Alert Email Advisory Issued, 11th October Our local background 24hr average was 39% above average yesterday, in dry weather. Hot rain is being detected in Nimbin today, with a rain swab test video showing up to 1.4 uSv/hr. It is suggested to keep pets and children out of the rain, and divert rain tank inflows. Here on the Sunshine Coast a quick test did not detect nearly as much activity.
September 2012 ( Month average 0.113 uSv/hr, 13% above year average )
September 28th Melbourne (Taodmac on Enenews) "We have had very unsettled (almost strange) weather today in Melbourne, Australia. There has also been Strong radar interference picked up on the Australian BOM network at 05:10 UTC on September 27, 2012 as well as very high scintillation and ionospheric readings during the last 18 hours. My counter had a very high background reading in the morning (0.30 uSv/hr) almost double the average here.
I tested a rain sample and it was the highest (1.74 uSv/hr) I have had in months? Did I miss something or is it just a random act of God? Strange weather from where I'm standing any ways! Anyone else have any answers?"
September 24th Sydney "I would like to say that "pulses in the range of 0.32 uSv/h" are so frequent in Sydney that I don't report anymore. My small Russian counter pulses every 2 hours or so at higher levels than this. I can leave it on for the weekend and take proper recordings."
September 23rd Dunedin New Zealand "Was outside with a few friends with the GS in the back yard ... and we started getting some 0.33-0.36 pulses coming through every 2-3 minutes .... bit of a shock." These are free air detections in uSv/hr using a Gamma Scout Geiger counter.
From the 19th to the 23rd of September the average daily background radiation levels here have increased significantly during this period, to 32% above average on the 23rd. This has been happening when the area receives a North / North easterly wind direction, for any significant period of time. Again the weather conditions have been mostly fine, no significant solar activity with one brief storm on the afternoon of the 21st. The storm did have some radon washout in it but the elevated background was present days before this storm occurred.
August 2012 ( Month average 0.109 uSv/hr, 9% above year average )
On the 23rd and 24th August the average daily background radiation levels increased significantly in a short period of time, to 15% and 22% above average. There were no real significant spikes detected or showing in the 24hr charts, just a general increase. Solar activity was very quite during this period, and it was dry. They were lovely fine days, and with mostly clear skies. The wind direction was from the north, or north east, our tropical north. When the wind direction changed to the south, south west, the background levels dropped. It did not drop to normal, but to around 9% above the local background four year average.
July 2012 ( Month average 0.109 uSv/hr, 9% above year average )
Email Advisory Issued, 20th July
Detection at Nimbin on the 19th and 20th July, "Both Kits are going nuts tonight. Patches of rain are coming over and the si180g's are regularly over 0.2 and lnd7317 10min average is steady around 0.3 with 1min peaks sometimes over 0.5!"
Charts of event,
Radioactive Cloud detection Caloundra the 14th July 2012. A tropical cloud stream coming down the east coast of Australia is bringing rain from the north east to our location. Here is the 24hr chart for the 14th July.
Radioactive Cloud detection Dunedin New Zealand the 13th July 2012. Just in, report of 80 to 100 CPM being detected in rain event.
Email Advisory Issued, 13th July
Radioactive cloud detections Caloundra, the 13th of July 2012. The Geiger counter alarm has triggered a couple times since midnight indicating detections 5x above average background. It may be wise to stay out of the rain. A tropical cloud stream coming down the east coast of Australia is bringing rain from the north east to our location. This chart shows a significant rise in background radiation levels and this incease is continuing into the 14th. Here is the 24hr chart for the 13th July.
Radioactive cloud detection Caloundra, the 12th of July 2012.
(The dark blue line through the daily charts is that day's average.)
June 2012 ( Month average 0.103 uSv/hr, 3% above year average )
Just in from contact in Sydney 23 June detection.
"6:44PM, my counter recorded the highest reading so far. At this precise time, my geiger was recording 1.5uSv/h and above 400CMP This is the first time ever I see it above 400 CPM"
70 CMP in Dunedin New Zealand, on the 23 June.
Also, some bread and plastic buckets where detected with significant contamination, with a contact's Geiger counter in New Zealand.
Just in from a contact in Sydney, detection 16th June.
"I've ordered another Geiger counter. So, if both counters spike at the same time, I'll be sure I that I have a true reading. It seems every first drops of rain in Sydney, a huge CPM (well above 100 CPM) spike is perceived. Today, I got one above 200 CPM. Because it seems consistent (every first drops of rain), it seems the worst case scenario is true: my equipment is working properly and readings are true. I'll only be sure when I have 2 counters running at the same time."
Radioactive cloud event detected at Glenview on the Sunshine Coast Australia, Thursday the 14th June in the afternoon starting at 3 pm the Geiger counter alarm multiple times at over 0.50 uS/Hr. The highest visual reading was 0.65 uS/hr. Elevated levels lasted for about three quarters of an hour. Here is the event data log chart.
May 2012 ( Month average 0.107 uSv/hr, 7% above year average )
Email just arrived with information about a high detecton on the 24th in Sydney.
I recently bought a GQ GMC300 nuclear radiation counter. I was woken up on 24/5 when its alarm went on. I downloaded it's log into my computer and attached screen shots plus a photo from it (207 CPM). My question is: are you aware about any radiation spike on 24/5 in Sydney or Australia? I suspect that a massive cover up is going on or my equipment is not working properly. Please do not reveal my email to third parties. I might just have a broken counter. I'm writing you this email because I found the following in your web site:"
Toadmac detected large amounts of radiation on the 24th of May from a cloud stream coming from the tropics through central eastern Australia and hitting Melbourne. It was to high a detection to be radon in some rain, up to 2.35 uSv/hr. http://www.youtube.com/watch?v=b6RykQF4HqA&feature=plcp
Detection at Dunedin New Zealand of 0.62uSv/Hr on the morning of the 22nd May. I didn't detect anything here at Caloundra during this period. A friend around 10 kilometers westward of me reported a sligh increase above his normal background on the 24th May. These weather systems luckly bypassed us.
April 2012 ( Month average 0.112 uSv/hr, 12% above year average )
Radioactive cloud detections on the 20th and 21st of April, see daily charts.
So far, all our radioactive cloud detections have occurred when the wind has come from the northern tropics. From my observations of the weather radar at the time, on the 20th and 21st, two air masses, a northerly and southerly, meet just north of Caloundra. The Geiger Counter alarm sounded on numerous occasions, indicating radiation levels went above .50 uSv/hr multiple times. These above .50 uSv/hr events where brief and were not recorded by the Geiger Counter data logger. My theory is that when the northerly pressure system pushed a little bit south, we got the radiation detections. When the northerly air mass was pushed north background went back to normal. The radioactive cloud detections are a result of the huge amounts of radiation released by the still active Fukushima Nuclear disaster, breaching the Northern and Southern hemisphere air circulation barrier.
Daily 24 hour background radiation chart 20042012
(The dark blue line through the daily charts is that day's average.)
Daily 24 hour background radiation chart 21042012
Radioactive cloud detections on the 23rd of April
Here is the chart for the 23rd, peaks not as high as the 20th and 21st April, but the days overall average radiation level was higher.
Daily 24 hour background radiation chart 23042012
March 2012 ( Month average 0.124 uSv/hr, 24% above year average )
5th average background up to 8.30am 0.145uS/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 .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.
Here is the 24 hour data chart, the blue line through chart is the daily average.
6th average background today 0.135 uS/Hr slightly above average
I am not getting any more peaks in radiation like yesterday. Peaks dropped off late Monday afternoon, plus the wind direction has changed from the north to south.
February 2012 ( Month average 0.137 uSv/hr, 37% above year average )
Radiation Cloud detected over Melbourne Australia 26th February 2012, http://www.youtube.com/watch?v=q74OAsV2yPU
January 2012 ( Month average 0.143 uSv/hr, 43% above year average )
Radiation Cloud detected over Australia 8th January 2012 read article here, https://sccc.org.au/archives/2490
Radiation Cloud detected over South Island of New Zealand 29th January 2012, https://sccc.org.au/archives/2517
Radiation Cloud detected over Australia 8th January 2012
Radiation Cloud detected over South Island of New Zealand 29th January 2012
Radiation Cloud detected over Melbourne Australia 26th February 2012
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. Views expressed in the pages or images on the SCCC Inc., site maybe the personal opinions of the relevant writers, and are not necessarily representative of those of SCCC Inc.