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  • Moderate Geomagnetic Storming Forecast

    From ARRL de WD1CKS@VERT/WLARB to QST on Tue May 16 16:02:48 2017
    Subject: Moderate Geomagnetic Storming Forecast
    @VIA: WLARB
    @MSGID: <591B22A8.2907.dove-ham@wd1cks.org>
    05/16/2017

    NOAA forecasters have issued[1] a watch for minor-to-moderate geomagnetic storms May 16-17. Forecasters say there is a 40% chance of minor (G1) geomagnetic storming on May 16, as Earth enters a stream of solar wind flowing from a hole in the Sun's atmosphere. The storm could intensify to moderate (G2) on May 17, due to a combination of coronal hole activity on the Sun's surface and the impending arrival of a May 13 coronal mass ejection (CME), which is expected to deliver a glancing blow to Earth's magnetic field.

    The storming could make auroral displays visible at lower-than-typical latitudes. Under G1 and G2 conditions, HF radio propagation can fade at higher latitudes.


    [1] http://www.swpc.noaa.gov/

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