Solar activity during first six years of solar cycle 24 and 23: a comparative study

Singh, Abhay Kumar; Tonk, Apeksha

doi:10.1007/s10509-014-2067-8

Cited by 17 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that solar cycle 24 is weaker than 23. Many authors also showed that solar cycle 24 is weaker than 23 (Richardson 2013;Singh et al 2014;Kakad et al 2019). It is supposed that the weak polar fields observed during the solar activity minimum period of solar cycle 23 are the main cause of the weakness of the solar cycle 24 (Jiang et al 2015).…”

Section: B Association Of Solar Flares With Super Active Regions (Sars)mentioning

confidence: 99%

A statistical analysis of X- class solar flares and their association with the super active regions during solar cycles 23- 24

Singh¹,

Chaudhary²,

Rathore³

et al. 2022

JSR

View full text Add to dashboard Cite

The A statistical distribution function of X-class flares and their association with super-active regions (SARs) during two recent solar cycles 23-24 have been analyzed. The obtained results show that, during solar cycle 23, 57.60 % of the total number of Xclass flares coincides with a set of X1.0 - X1.9 flares, 15.20 % to X2.0 - X2.9, 12.80 % to X3.0 - X4.9, 9.60 % to X5.0 - X9.9, and 4.80 % to ≥ X10 flares. During solar cycle 24, 61.20 % of the total number of X-class flares coincides with a set of X1.0 - X1.9 flares, 22.40 % to X2.0 - X2.9, 8.16 % to both the X3.0 - X4.9 flares, and X5.0 - X9.9 flares. None of the ≥ X10 flares. All X-class flares are found to be in a scattered manner in solar cycles 23 and 24. Among the cycles, solar cycle 24 has been observed relatively very weak cycle and the total number of X-class flares diminished in comparison to previous solar cycles. During solar cycle 23, 29.16% of the X1.0 - X1.9 flares, 36.84 % of the X2.0 - X2.9 flares, 43.75 % of the X3.0 - X4.9 flares, 83.33 % of both the X5.0 - X9.9 flares, and 100.00 % of the ≥ X10 flares were produced by SARs. While during solar cycle 24, 20.00 % of the X1.0 - X1.9 flares, 36.36 % of the X2.0 - X2.9 flares, 25.00 % of the X3.0 - X4.9 flares, 75.00 % of the X5.0 - X9.9 flares, and 0.00 % of the ≥ X10 flares were produced by SARs.

show abstract

Section: B Association Of Solar Flares With Super Active Regions (Sars)mentioning

confidence: 99%

A statistical analysis of X- class solar flares and their association with the super active regions during solar cycles 23- 24

Singh¹,

Chaudhary²,

Rathore³

et al. 2022

JSR

View full text Add to dashboard Cite

show abstract

“…Here OSIRIS Na data are daily averaged over the tropics (27° S–27° N) from 2004 to mid‐2013, spanning portions of solar cycles 23 and 24. Although the solar cycle 24 is unusually quiet (e.g., Singh & Tonk, ), observations can still be used to test the model result.…”

Section: Data Description and Analysismentioning

confidence: 99%

The 27‐Day Solar Rotational Cycle Response in the Mesospheric Metal Layers at Low Latitudes

Feng

Xue

et al. 2019

Geophysical Research Letters

View full text Add to dashboard Cite

To investigate the response of the meteoric metal layers in the mesosphere and lower thermosphere regions to the 27‐day solar rotational cycle, a long‐term simulation of the Whole Atmosphere Community Climate Model with the chemistry of three metals (Na, K, and Fe) was analyzed. The correlation between variability in the metal layers and solar 27‐day forcing during different phases of the solar 11‐year cycle reveals that the response in the metal layers is much stronger during solar maximum. The altitude‐dependent correlation and sensitivity of the metal layers to the solar spectral irradiance demonstrates that there is a significant increase in sensitivity to solar rotational cycle with increasing altitude. Above 100 km, the sensitivity of the metals to changes of 10% in the solar spectral irradiance at Lyman‐alpha is estimated to be −5%. A similar response is seen in Na layer measurements made by the Optical Spectrograph and InfraRed Imaging System instrument on the Odin satellite.

show abstract

Upper Ionosphere of Mars During Low, Medium and High Solar Activity

Haider

2023

Astrophysics and Space Science Library

View full text Add to dashboard Cite

Solar activity during first six years of solar cycle 24 and 23: a comparative study

Cited by 17 publications

References 16 publications

A statistical analysis of X- class solar flares and their association with the super active regions during solar cycles 23- 24

A statistical analysis of X- class solar flares and their association with the super active regions during solar cycles 23- 24

The 27‐Day Solar Rotational Cycle Response in the Mesospheric Metal Layers at Low Latitudes

Upper Ionosphere of Mars During Low, Medium and High Solar Activity

Contact Info

Product

Resources

About