Â Â Â Behemoth sunspot AR2192 has unleashed an X1-class solar flare. NASA’s Solar Dynamics Observatory recorded the blast in this extreme UV image of the sun on Oct. 19th (0500 UT)(see above).
A pulse of ultraviolet and X-radiation from the flare caused a brief but strong HF radio blackout on the dayside of Earth, mainly over Asia and Australia. . . .