I was just going through some of the historical data and noticed on October 31s, and November 1st, both around the same time of day (~2:00 AM) there was a fairly large radiation spike. I can’t find similar events on nearby monitors. Does anyone know of any events that could have caused these readings?

…also I was welding about 30 ft. away from the sensor when these readings occured. But I regularly weld in that exact spot with absolutely no reaction from the meter. I don’t want to discount the possability that it caused it, however it happens so frequently I don’t know what would have changed that day.