I signed up for the Spaceweather.com Text Alert for X-Class Flares. Might give me time to put the vulnerable comm devices in the metal safe or my garbage can faraday cage vault.
Above: note the four separate events in the last two days – from the WUWT Solar Page
(From NASA’s Spaceweather.com) When the week began, the sun hadn’t unleashed an X-flare all year long. In only two days, sunspot AR1748 has produced four. The latest X-flare from this active sunspot occured on May 15th at 0152 UT. NASA’s Solar Dynamics Observatory captured the extreme ultraviolet flash:
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