Latest Alerts


    1. P11WP11W

      Space Weather Message Code: WARPX1

      Serial Number: 588

      Issue Time: 2024 Nov 01 1727 UTC

      CANCEL WARNING: Proton 10MeV Integral Flux above 10pfu expected

      Cancel Serial Number: 587

      Original Issue Time: 2024 Oct 31 0008 UTC

      Comment: The greater than 10 MeV proton flux has decreased below 10 pfu and is no longer expected to reach event levels.

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

      Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

    1. P11SP11S

      Space Weather Message Code: SUMPX1

      Serial Number: 118

      Issue Time: 2024 Nov 01 1727 UTC

      SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu

      Begin Time: 2024 Oct 26 1910 UTC

      Maximum Time: 2024 Oct 28 1350 UTC

      End Time: 2024 Nov 01 0735 UTC

      Maximum 10MeV Flux: 364 pfu

      NOAA Scale: S2 - Moderate

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

    1. ALERT: Type IV Radio Emission TIVA

      Space Weather Message Code: ALTTP4

      Serial Number: 671

      Issue Time: 2024 Nov 01 1124 UTC

      ALERT: Type IV Radio Emission

      Begin Time: 2024 Nov 01 1034 UTC

      Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

    1. ALERT: Geomagnetic K-index of 4 K04A

      Space Weather Message Code: ALTK04

      Serial Number: 2496

      Issue Time: 2024 Nov 01 0006 UTC

      ALERT: Geomagnetic K-index of 4

      Threshold Reached: 2024 Oct 31 2359 UTC

      Synoptic Period: 2100-2400 UTC

      Active Warning: Yes

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

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

      Induced Currents - Weak power grid fluctuations can occur.

      Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

    1. P11WP11W

      Space Weather Message Code: WARPX1

      Serial Number: 587

      Issue Time: 2024 Oct 31 2354 UTC

      EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected

      Extension to Serial Number: 586

      Valid From: 2024 Oct 31 0000 UTC

      Now Valid Until: 2024 Nov 01 2359 UTC

      Warning Condition: Persistence

      Predicted NOAA Scale: S1 - Minor

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

      Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

    1. BHISBHIS

      Space Weather Message Code: SUM10R

      Serial Number: 846

      Issue Time: 2024 Oct 31 2212 UTC

      SUMMARY: 10cm Radio Burst

      Begin Time: 2024 Oct 31 2110 UTC

      Maximum Time: 2024 Oct 31 2111 UTC

      End Time: 2024 Oct 31 2124 UTC

      Duration: 14 minutes

      Peak Flux: 910 sfu

      Latest Penticton Noon Flux: 270 sfu

      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.

    1. WARNING: Geomagnetic K-index of 4 expected K04W

      Space Weather Message Code: WARK04

      Serial Number: 4743

      Issue Time: 2024 Oct 31 2201 UTC

      WARNING: Geomagnetic K-index of 4 expected

      Valid From: 2024 Oct 31 2200 UTC

      Valid To: 2024 Nov 01 0900 UTC

      Warning Condition: Onset

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

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

      Induced Currents - Weak power grid fluctuations can occur.

      Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

    1. XX0SXX0S

      Space Weather Message Code: SUMX01

      Serial Number: 180

      Issue Time: 2024 Oct 31 2138 UTC

      SUMMARY: X-ray Event exceeded X1

      Begin Time: 2024 Oct 31 2112 UTC

      Maximum Time: 2024 Oct 31 2120 UTC

      End Time: 2024 Oct 31 2127 UTC

      X-ray Class: X2.0

      Optical Class: 3b

      Location: N15E28

      NOAA Scale: R3 - Strong

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

      Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.

      Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

    1. ALERT: X-Ray Flux exceeded M5 XM5A

      Space Weather Message Code: ALTXMF

      Serial Number: 447

      Issue Time: 2024 Oct 31 2116 UTC

      ALERT: X-Ray Flux exceeded M5

      Threshold Reached: 2024 Oct 31 2115 UTC

      NOAA Scale: R2 - Moderate

      NOAA Space Weather Scale descriptions can be found at

      www.swpc.noaa.gov/noaa-scales-explanation

      Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.