IMD RSMC New Delhi cyclones
North Indian Ocean cyclone tracks, forecast wind radii, and cones of uncertainty come from the official IMD API (weather:imd-cyclone-marine:v1). Observed positions stay distinct from forecast positions. Wind radii and the cone of uncertainty are forecast/uncertainty geometry, never an observed storm footprint. The seeder does not flatten these products into weather:alerts:v1. Live fetch requires IMD_API_KEY; a disabled or empty snapshot is not an all-clear.
GDACS (Global Disaster Alert and Coordination System)
UN-backed disaster alert system providing official severity assessments:
Alert Levels:
NASA EONET (Earth Observatory Natural Event Tracker)
Near-real-time natural event detection from satellite observation:Multi-Source Deduplication
When both GDACS and EONET report the same event:- Events within 100km and 48 hours are considered duplicates
- GDACS severity takes precedence (human-verified)
- EONET geometry provides more precise coordinates
- Combined entry shows both source attributions
Filtering Logic
To prevent map clutter, natural events are filtered:- Wildfires: Only events < 48 hours old (older fires are either contained or well-known)
- Earthquakes: M4.5+ globally, lower threshold for populated areas
- Storms: Only named storms or those with warnings