Radiation

Radiation on TerraPulse is organized across three dexes — the radiation_monitor Locationdex, the safecast_fixed_sensor Locationdex, and the safecast_mobile_survey MovingPlatformDex. Every slot is a measured record of ambient radiation from a real instrument, drawn from a government monitoring network and a global volunteer effort. No estimates, no forecasts.

The dexes

The record splits by who measures it and how. Counts are live and grow as new stations report and new surveys are logged:

Together that is 744 radiation-measuring points and surveys across the United States and, through Safecast, the wider world.

Provenance

The fixed government network comes from EPA RadNet, which continuously measures ambient gamma radiation, particulates, and precipitation at 334 stations nationwide. The volunteer network comes from Safecast, the open citizen-science project founded after Fukushima, contributing both stationary sensors and mobile survey runs. Each source is registered against its dex, so any record carries a direct line back to the originating measurement.

What’s in a record

Each slot carries:

• Dose rate — measured ambient radiation, in µSv/h or cpm
• Location — latitude and longitude of the station or survey point
• Timing — the measurement timestamp, UTC
• Instrument — the detector or sensor type behind the reading
• Network — RadNet or Safecast, fixed or mobile

Explored in

• Solar Watch, April 2026 — where Safecast radiation readings are cross-checked against a solar storm