Table 3
Solar flare activity in the FUV.
| Species (feature nm) | Activity level | Nature | Variability levela (%) | |
|
|
||||
| C II (133.5) | (L, M, H, E) | flare | (3.7, 7.6, 12.5, 30.0) | |
| O I (130.5) | (L, M, H, E) | flare | (2.7, 5.0, 7.3, 16.0) | |
| Si III (120.6) | (L, M, H, E) | flare | (4.0, 9.0, 12.8, 27.6) | |
| Si IV (139.8) | (L, M, H, E) | flare | (4.3, 8.6, 14.3, 33.4) | |
| C IV (154.0) | (L, M, H, E) | flare | (3.9, 5.0, 11.7, 31.7) | |
| C II (133.5) | (27D, 11Y) | sunspot | (22, 57) | |
| O I (130.5) | (27D, 11Y) | sunspot | (15, 29) | |
| Si III (120.6) | (27D, 11Y) | sunspot | (27, 73) | |
| Si IV (139.3) | (27D, 11Y) | sunspot | (22, 60) | |
Notes. Solar observations were obtained with the Solstice instrument onboard SORCE using the 1 nm low-resolution spectrometer. The flare activity level is based on a list of flaring events derived by the Colorado/LASP team (lasp.colorado.edu/see/see-flare-catalog.html). (L, M, H, E) are for low- (class M1), medium- (class M5), high- (X1), and extreme- (X17) activity flare activity (Hudson 2011). (27D, 11Y) are the 27-days spin and solar cycle periods (Woods & Rottman 2002).
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