Netc has limits as a monitoring system, but it does tie into government monitoring in Japan and the US and provides data from individual citizen monitoring as well. Netc is widely accessible and easy to use. Netc's creator developed an effective strategy for comparisons across monitors based on deviation upwards or downwards from that location's mean average:
Nuclear Emergency Tracking Center - Netc.com is an Early Warning Radiation System that takes data from private radiation monitoring stations and EPA network and creates a RBL ( Radiation Background Level ) for each 3000+ stations everyday. NORM ( Natural Occurring Radioactive Material ) radiation background level has been simplified in name only to RBL ( Radiation Background Level ). The same calculations are still used. Radcon-1 will be the middle of RBL ( Radiation Background Level ) range and it will be compared to the Current Radiation at that monitoring station. The increase change between middle of RBL and the Current Radiation will set the Radcon levels 2 for small increase, 3 for higher increase, and 4 for the top of the range over a three month time frame. When RBL is above the radiation background range and other requirements are met, an Radcon-5 Alert will be issue and Email/Text messages are sent. If the Radcon-1 is Green/Yellow, the RBL (Radiation Background Level) is decreasing or staying the same level, like in Japan where most of the RBL are Green/Yellow.This system offers an early warning system but its indicators are rough. I watch it with these understandings.
Japan has had rising levels over the last week or so and today they are higher than they've been in a while (I've seen them hotter a few times). What worries me is that they've been trending upwards during the same week that TEPCO announced a problem with the gate for unit 3 spent fuel pool, as reported by Fukushima Dairy:
I am seeing rising radiation blips in the US but they haven't been as sustained or nearly as high as what I'm seeing in Japan
here is a time stamp from the Futaba cam for the screenshot above