{"source":"space-weather","note":"Free 5-item preview. The full feed is $0.05/call at GET /v1/space-weather/changes.","question":"Which space-weather alerts (geomagnetic storms, solar flares, radio blackouts) were issued since T, and how strong?","sample":[{"source":"space-weather","entityId":"swpc:EF3A-2026-07-19 12:04","type":"space_weather","title":"CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu","summary":"Space Weather Message Code: ALTEF3 Serial Number: 3719 Issue Time: 2026 Jul 19 1204 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Continuation of Serial Number: 3718 Begin Time: 2026 Jul 17 1750 UTC Yesterday Maximum 2MeV Flux: 1170 pfu Max time: 2026 Jul 18 1715 UTC","significance":6,"detectedAt":"2026-07-19T23:36:16.915Z","effectiveDate":"2026-07-19T12:04:04.020Z","sourceUrl":"https://www.swpc.noaa.gov/products/alerts-watches-and-warnings","detail":{"productId":"EF3A","scale":null,"issued":"2026-07-19 12:04:04.020"}},{"source":"space-weather","entityId":"swpc:A20F-2026-07-19 20:14","type":"space_weather","title":"WATCH: Geomagnetic Storm Category G1 Predicted [G1]","summary":"Space Weather Message Code: WATA20 Serial Number: 1116 Issue Time: 2026 Jul 19 2014 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 20: None (Below G1) Jul 21: None (Below G1) Jul 22: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible…","significance":5,"detectedAt":"2026-07-19T23:36:16.914Z","effectiveDate":"2026-07-19T20:14:34.243Z","sourceUrl":"https://www.swpc.noaa.gov/products/alerts-watches-and-warnings","detail":{"productId":"A20F","scale":"G1","issued":"2026-07-19 20:14:34.243"}},{"source":"space-weather","entityId":"swpc:EF3A-2026-07-17 18:22","type":"space_weather","title":"ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu","summary":"Space Weather Message Code: ALTEF3 Serial Number: 3717 Issue Time: 2026 Jul 17 1822 UTC ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Threshold Reached: 2026 Jul 17 1750 UTC Station: GOES-18 Comment: Yesterday's max: 1382 pfu","significance":6,"detectedAt":"2026-07-18T23:42:46.063Z","effectiveDate":"2026-07-17T18:22:33.660Z","sourceUrl":"https://www.swpc.noaa.gov/products/alerts-watches-and-warnings","detail":{"productId":"EF3A","scale":null,"issued":"2026-07-17 18:22:33.660"}},{"source":"space-weather","entityId":"swpc:EF3A-2026-07-18 15:26","type":"space_weather","title":"CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu","summary":"Space Weather Message Code: ALTEF3 Serial Number: 3718 Issue Time: 2026 Jul 18 1526 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Continuation of Serial Number: 3717 Begin Time: 2026 Jul 17 1750 UTC Yesterday Maximum 2MeV Flux: 1085 pfu Max time: 2026 Jul 18 1520 UTC","significance":6,"detectedAt":"2026-07-18T23:42:46.063Z","effectiveDate":"2026-07-18T15:26:56.300Z","sourceUrl":"https://www.swpc.noaa.gov/products/alerts-watches-and-warnings","detail":{"productId":"EF3A","scale":null,"issued":"2026-07-18 15:26:56.300"}},{"source":"space-weather","entityId":"swpc:EF3A-2026-06-16 11:24","type":"space_weather","title":"CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu","summary":"Space Weather Message Code: ALTEF3 Serial Number: 3702 Issue Time: 2026 Jun 16 1124 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3701 Begin Time: 2026 Jun 13 1332 UTC Yesterday Maximum 2MeV Flux: 1489 pfu","significance":6,"detectedAt":"2026-07-15T20:17:23.701Z","effectiveDate":"2026-06-16T11:24:14.140Z","sourceUrl":"https://www.swpc.noaa.gov/products/alerts-watches-and-warnings","detail":{"productId":"EF3A","scale":null,"issued":"2026-06-16 11:24:14.140"}}]}