Geographic Convergence
Geographic convergence is when three or more distinct event types co-occur inside the same one-degree map cell within 24 hours, which fires a convergence alert flagging an area where separate signals are stacking up.
Geographic convergence detection bins events — protests, military flights, vessels, earthquakes, and more — into 1°×1° geographic cells over a rolling 24-hour window. When three or more distinct event types converge in a single cell, a convergence alert fires.
Alert severity is driven by type diversity (about 25 points per unique event type) plus event-count bonuses (capped at 25). Four converging types, or a score of 90 or above, is treated as critical; three-type alerts below 90 are high priority. Each alert is reverse-geocoded to a human-readable place name using conflict-zone, waterway, and hotspot databases.