I thought background radiation had returned to close to normal since averages were around 15 μR/hr most of the day but at about 8PM readings started to rise again. This time there was no rainfall associated with the rising averages.
I’ve checked the Solar Activity Forecast: Quote “Solar activity is expected to be at very low to levels with a chance for C-class events for the next three days (16-18 July).” So that doesn’t seem to explain anything.
My monitor is 10 feet above the ground, outside so soil gasses or their decay products shouldn’t be the reason.
I have an offer to test a rainwater sample which I have collected…
Saturday 16 July, 2011 Graph Update:
Here is the above 15 July plot with 13 more hours added data. Very similar to the plot in the previous post – rising rapidly and falling back to near normal range again. No additional rainfall recorded during this period though. So maybe the time of day has more to do with this effect.
Open to any possible explaination including equipment malfunction but the normal readings before and after the 13 – 15 hour events seem to indicate all is well with the monitor.
If there is anyone with other monitoring equipment in this area (North Okanagan/Shuswap) please let me know if you are seeing anything similar.