Code: ALTTP2

Issue Time: 2026 Apr 27 0106 UTC

Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event."

Code: ALTTP2

Issue Time: 2026 Apr 27 0106 UTC

Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event."

Code: WARK04

Issue Time: 2026 Apr 26 1147 UTC

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.

Code: WARK04

Issue Time: 2026 Apr 25 0137 UTC

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.

Code: SUM10R

Issue Time: 2026 Apr 23 1723 UTC

Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications."

Code: ALTEF3

Issue Time: 2026 Apr 22 0503 UTC

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems."

Code: WARK04

Issue Time: 2026 Apr 21 1651 UTC

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.