DONKI Space Weather Event Chain
A 5-step recipe with NASA. We can help you get access.
Recipe · 5 steps
DONKI Space Weather Event Chain
with NASA
Reconstruct the flare to geomagnetic storm chain across a single date window.
- Start at the origin of the chain. Solar flares report the active region number, the class type that grades the flare's X-ray intensity, and the begin, peak, and end times that anchor everything downstream.
- Pull the coronal mass ejections recorded over the same window. Each CME carries the activity ID, its start time, the source location on the solar disc, and the instruments that observed it.
- Retrieve the CME analysis records, restricted to the most accurate measurement per event across all catalogs. Speed, half angle, latitude, and longitude are what turn an observed ejection into an arrival forecast.
- Check whether anything from this window actually arrived, by pulling interplanetary shocks detected at Earth across all catalogs. A shock at Earth is the observational confirmation that a CME reached us.
- Close the chain with the terrestrial impact. Geomagnetic storms report a storm ID, start time, and the observed Kp index series that quantifies how hard Earth's magnetic field was disturbed.
What you'll need to have ready
- apiKey: NASA API key from api.nasa.gov. DEMO_KEY works for low-volume testing.
- startDate: Start of the space weather window (YYYY-MM-DD). DONKI defaults to 30 days prior.
- endDate: End of the space weather window (YYYY-MM-DD). DONKI defaults to today.
For your developer
Arazzo workflow nasa:donki-space-weather-event-chain, 5 operations: getSolarFlares → getCoronalMassEjections → getCmeAnalysis → getInterplanetaryShocks → getGeomagneticStorms. Specs on APIs.io.