


Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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798 FXXX06 KWNP 210156 WEKHIL :Product: 7-day Space Weather Highlights :Issued: 2025 Apr 21 0125 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # 7-day Space Weather Highlights # Highlights of Solar and Geomagnetic Activity 14 - 20 April 2025 Solar activity reached moderate levels due to M-class flare activity on 14-15, 18 and 20 Apr. The largest event of the period was an M4.4 flare at 18/2350 UTC from an unseen source beyond the SE limb. No Earth-directed CMEs resulted from this week's solar activity. No proton events were observed at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 14 Apr, with normal to moderate levels observed over 15-20 Apr. Geomagnetic field activity began the period at quiet to active levels in response to negative polarity CH HSS influences on 14 Apr. Periods of G1-G2 (Minor-Moderate) storming was observed on 15 Apr, with periods of G1-G4 (Minor-Severe) storming observed on 16 Apr, due to the passage of a CME that left the Sun on 13 Apr. Remnant CME influences and bouts of southward IMF persisted on 17-18 Apr with quiet to active levels observed. Quiet to active levels were observed on 19 Apr, and quiet to G1 (Minor) levels were observed on 20 Apr, in response to prolonged periods of southward Bz.