The global DX cluster network — how spots propagate, how the BloomWX band-activity heatmap aggregates a 60-min rolling window into a (band × continent) heat field.
The DX cluster is a global network where operators "spot" interesting stations they're hearing. Each spot is a message — "I just heard ZS6XYZ on 14.025 at 2030Z" — that propagates through the network.
Aggregates a rolling 60-minute window of spots into a (band x continent) heatmap. Each cell is a soft colored blob whose size scales with spot count. The "from" selector filters by spotter continent.
Source: DX Lite (G7VJR).
Part of the BloomWX learn library — beginner-friendly explainers covering every surface of the BloomWX weather dashboard. Open BloomWX to see live data for any U.S. county.