S3 - STRONG SOLAR RADIATION STORM IN PROGRESS, ACTIVE ALERT FOR AIRCREWS AND PREGNANT PASSENGERS
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Subject: S3 - STRONG SOLAR RADIATION STORM IN PROGRESS, ACTIVE ALERT FOR AIRCREWS AND PREGNANT PASSENGERS Mon Sep 11, 2017 9:09 am
S3 - STRONG SOLAR RADIATION STORM IN PROGRESS, ACTIVE ALERT FOR AIRCREWS AND PREGNANT PASSENGERS
A powerful X8.2 solar flare erupted from Region 2673, located just around the visible disk, at 16:06 UTC on September 10, 2017, causing R3 - Strong radio blackout and a rapid increase in relativistic proton levels. Within just 3 hours, solar radiation storm reached S3 - Strong levels (on a scale of 1 - 5).
Subject: S3 - STRONG SOLAR RADIATION STORM IN PROGRESS, ACTIVE ALERT FOR AIRCREWS AND PREGNANT PASSENGERS 
Mon Sep 11, 2017 9:09 am
