DIY Build Your Own Geiger Counter - radiation detector
GQ Electronics Technical Support Forum - UV and SUN light with Geiger Counter measurements
Radiation at 36000 Feet! - Geiger Counter on an Airplane - YouTube
UPDATE: the geiger counter recorded an anomaly. I'm investigating now, so far I've ruled out WW3. The anomalous reading was at 2021-06-30 09:21UTC recorded in Belleville, Ontario, Canada. : r/homeassistant