Hazards
Radiation levels
Gamma radiation readings from the US government’s RadNet monitors and Safecast’s volunteer network, with RadNet stations compared against their own normal.
What you see
- A point per monitor, with its latest reading in nanosieverts per hour.
- For RadNet stations, a verdict against the station’s 7-day average.
- Stations silent for 6 hours are marked offline.
Where the data comes from
- EPA RadNetFixed air monitors across the United States.
- SafecastVolunteer-built sensors that report on their own, worldwide.
RadNet is read hourly and Safecast every 15 minutes; the map checks every 5.
Good to know
- Rain washes natural radioactivity out of the air and often causes short spikes. A spike alone is not a warning.
- Safecast readings are shown without a verdict.
Goes well with
Earthquakes, liveEvery earthquake of magnitude 2.5 or more in the last 24 hours, worldwide, from USGS and EMSC on one live map, with magnitude, depth and place.
Disaster alertsEarthquakes, tropical cyclones, floods, volcanoes and droughts flagged by GDACS, the UN and EU global disaster alert system, on a live map.