X 18.0 Solar Flare

Page captured from sec.noaa.gov.

GOES 12

GOES 10

Cur	1211	X1.5	Ratio 0.167		1211	X1.6	Ratio 0.155
Beg	0951	C5.7			0951	C5.5
Max	1110	X 18	Int 1.96e+00 J m-2		1110	X 17	Int 1.84e+00 J m-2
End	1124	X9.0			1124	X8.5

This GOES X-ray flux plot contains 1 minute averages of solar X-ray output in the 1-8 Angstrom (0.1-0.8 nm) and 0.5-4.0 Angstrom (0.05-0.4 nm) passbands. Data from both operational GOES satellites are included. Some data dropouts will occur during satellite eclipses. SEC alerts are issued at the M5 (5x10E-5 Watts/m2) and X1 (1x10E-4 Watts/m2) levels, based upon 1-minute data. Large X-ray bursts cause short wave fades for HF propagation paths through the sunlit hemisphere. Some large flares are accompanied by strong solar radio bursts that may interfere with satellite downlinks.

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