Flare Index

Flare Index değerleri 1976 yılından beri Astronomi Laboratuvarı tarafından düzenli olarak hesaplanmakta, bu veriler ulusal ve uluslararası bilimsel kurum ve araştırıcıların istifadesine sunulmaktadır.

 

21. ÇEVRİM     22. ÇEVRİM     23. ÇEVRİM     24. ÇEVRİM


Flare Nedir?

A spectacular solar flare as seen by the NASA's Solar Dynamics Observatory in the 193 Ångström wavelength.

NASA Solar Dynamics Observatory tarafından kaydedilen bir flare görüntüsü (193 Ångström dalgaboyu)

A solar flare is basically a giant explosion on the surface of our Sun which occurs when magnetic field lines from sunspots tangle and erupt. A solar flare is defined as a sudden, rapid, and intense variation in brightness. A solar flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. Material is heated to many millions of degrees in just minutes and radiation is emitted across virtually the entire electromagnetic spectrum, from radio waves at the long wavelength end, through optical emission to X-rays and gamma rays at the short wavelength end. The amount of energy released is equivalent to millions of nuclear bombs exploding all at the same time! Solar flares are an often occurrence when the Sun is active in the years around solar maximum. Many solar flares can occur on just one day during this period! Around solar minimum, solar flares might occur less than once per week. Large flares are less frequent than smaller ones. Some (mostly stronger) solar flares can launch huge clouds of solar plasma into space which we call a coronal mass ejection. When a coronal mass ejection arrives at Earth, it can cause a geomagnetic storm and intense auroral displays.

The largest solar flare ever recorded since satellites started to measure them in 1976 was estimated to be an X28 solar flare which occurred on November 4th, 2003 during Solar Cycle 23.

Flare Sınıflaması

Sınıf 1 & 8 Ångström arası (W/m2)
A <10-7
B ≥10-7 <10-6
C ≥10-6 <10-5
M ≥10-5 <10-4
X ≥10-4

 

Flare hakkında : https://hesperia.gsfc.nasa.gov/sftheory/ (NASA Goddard Space Flight Center)

Referanslar
Atac, T.: 1987, Astrophys. Space Sci. 135, 201
Ozguc, A. and Atac, T.: 1989, Solar Phys., 123, 357-365
Ozguc, A. and Atac, T.: 1994, Solar Phys., 150, 339-346
Ozguc, A. and Atac, T.: 1996, Solar Phys., 163, 183-191
Atac, T. and Ozguc, A.: 1996, Solar Phys., 166, 201-208
Atac, T. and Ozguc, A.: 1998, Solar Phys, 180, 397-407
Atac, T. and Ozguc, A.: 2001, Solar Phys. 198, 399-407
Ozguc, A. and Atac, T.: 2003, Solar Phys. 214, 375-396
Kleczek, J.: 1952, Publ. Inst. Centr. Astron., No. 22, Prague.
Knoska, S and Petrasek, J.: 1984, Contr. Astron. Obs. Skalnate Pleso 12, 165.
 


Kandilli Rasathanesi'nde Flare Index hesaplanmasını başlatan ve 1976 - 2009 yıllarını hesaplayan Dr.Tamer Ataç'a teşekkür ederiz.

NOAA National Geophysical Data Center Solar Flare Data

son güncelleme : 09 / 2019