BitBOINC
Radiation map
Volunteers connect a Yarrow radiation detector to their computer and share its measurements. The map shows the median background dose rate for every city with a detector, over the time you pick, and refreshes itself every 30 seconds. Only the city is shown, never anything more exact, and the tables say who sends data but not where. LIVE
Cities
| City | Detectors | Median nSv/h | Compared with usual | Last data |
|---|---|---|---|---|
| Fürstenfeldbruck | 2 | 148 | ▶ | 14 min ago |
| Denizli / Laodikeia (Λαοδίκεια) | 1 | 171 | ▶ | 14 min ago |
| Oslo | 1 | 104 | ▶ | 14 min ago |
| Freiberg | 1 | 109 | - | 4 min ago |
| Montauban | 1 | 73 | ▶ | 14 min ago |
Who sends data
6 volunteers, 8 detectors, 257 hours of measurements in total.
| Volunteer | Detectors | Bins | Hours | Last data |
|---|---|---|---|---|
| Alperen Yavuz | 1 | 496 | 82.7 | 14 min ago |
| JagDoc | 2 | 492 | 82.0 | 14 min ago |
| Hans Sveen | 1 | 341 | 56.8 | 14 min ago |
| franky82 | 1 | 107 | 17.8 | 14 min ago |
| L@MiR | 2 | 53 | 10.2 | 4 min ago |
| aendgraend | 1 | 46 | 7.7 | 19 h ago |
What do these numbers mean?
The unit is nanosieverts per hour (nSv/h), the dose rate from natural background radiation. Typical values are about 50 to 200 nSv/h; they differ with the ground (granite and some volcanic rocks give more), the building (stone and concrete give more than wood), altitude (about double at 2000 m) and the weather (rain can raise the reading for a short time). Flying at cruising altitude gives several thousand nSv/h.
Colours: blue under 80, green 80 to 150, violet 150 to 300, pink 300 to 600, red 600 to 1500, white above. Red or white on a quiet day is unusual and worth a second look, most often a detector that needs calibrating or sits next to something radioactive such as old luminous watch dials or a smoke detector source.
A higher than usual notice means the last 3 hours of one detector are clearly above the 24 hours before, far more than counting noise explains. It is information from hobby instruments of volunteers, not an official warning system.
Have a detector? Join in
- Put the Yarrow firmware on a FNIRSI GC-03 (file for your language on github.com/alplix/yarrow).
- Join this project and attach your computer in the BOINC Manager. Create an account
- In the project preferences select the Yarrow monitor and enter your country and city. Preferences
- Plug the detector into the computer, switch it on and leave it on the main screen. The monitor finds it by itself.