The different types of solar flares

Presentation Belgian Solar Section - 28 September 2002

Last update: 28 September 2002


Contents


Origin

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Ha-flares

  1. Generalities
ImportanceAc ( MH )Ac ( °2 )Ac ( 106 km2 )
S10 < Ac < 1000,2 < Ac < 2,130 < Ac < 304
1100 < Ac < 2502,1 < Ac < 5,2304 < Ac < 761
2250 < Ac < 6005,2 < Ac < 12,4761 < Ac < 1826
3600 < Ac < 120012,4 < Ac < 24,71826 < Ac < 3653
41200 < Ac24,7 < Ac3653 < Ac

CategoryBrightness (%)BandwidthVisual
F (faint)160 < h < 2600,08 nm < b < 0,12 nmNormal
N (normal)260 < h < 3600,12 nm < b < 0,20 nmBright
B (brilliant)360 < h0,20 nm < bBrilliant

Example: NOAA 8858, 3B, 05 Feb 02 19:26 UT

  1. Specials

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Rontgenflares

  1. Generalities
Peak Flux Range (0,1 - 0,8 nm)
ClassEnergy (W/m2)
AMax < 10-7
B10-7 < Max < 10-6
C10-6 < Max < 10-5
M10-5 < Max < 10-4
X10-4 < Max

Example: NOAA 9236, X2.3, 24 Nov 00, piek @ 15:13 UT

  1. Specials
  2. White Light Flares
  • Rare phenomenon, viewed for the first time in 1859 by Carrington & Hodgson
  • Originates sometimes with highenergetic X-ray flares
    • The released energy is so huge that it becomes visible in visual light (photosphere)
  1. Protonflare

Example: X5/3B flare of 14 Jul 00 by NOAA 9077 (image: SOHO)

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Radioflares

  1. Generalities

Example: X1,5 by NOAA 10095 on 30 Aug 02

  1. Radiosweeps

Example: Types radiosweeps, en voorbeeld van Type 2 & 3 radiosweep

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Sources

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