The Formation of a Sunspot Penumbra Sector in Active Region NOAA 12574

2018 ◽  
Vol 857 (1) ◽  
pp. 21 ◽  
Author(s):  
Qiaoling Li ◽  
Xiaoli Yan ◽  
Jincheng Wang ◽  
DeFang Kong ◽  
Zhike Xue ◽  
...  
Keyword(s):  
Active Region ◽  
Active Region Noaa ◽  
Region Noaa ◽  
Sunspot Penumbra

Morphology of the flare-productive active region NOAA 9087

2020 ◽  
Vol 36 (3) ◽  
pp. 69-90
Author(s):  
S. N. Chornogor ◽  
◽  
N. N. Kondrashova ◽  
Keyword(s):  
Active Region ◽  
Active Region Noaa ◽  
Region Noaa

Characteristics of Soft X-Ray Radiation of the Solar Active Region NOAA 1024 Registered by the PINGVIN-M Device in July 2009

2020 ◽  
Vol 60 (7) ◽  
pp. 936-941
Author(s):  
M. I. Savchenko ◽  
P. V. Vatagin ◽  
P. B. Dmitriev ◽  
M. G. Ogurtsov ◽  
E. M. Kruglov ◽  
...  
Keyword(s):  
Active Region ◽  
Solar Active Region ◽  
Active Region Noaa ◽  
X Ray ◽  
Region Noaa

The three-dimensional structure of the corona above active region NOAA 9591 from microwave observations

2006 ◽  
Vol 50 (8) ◽  
pp. 679-686 ◽  
Author(s):  
N. G. Peterova ◽  
B. V. Agalakov ◽  
T. P. Borisevich ◽  
A. N. Korzhavin ◽  
B. I. Ryabov
Keyword(s):  
Active Region ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Active Region Noaa ◽  
Three Dimensional Structure ◽  
Region Noaa

Where do running penumbral waves emerge in chromosphere?

2018 ◽  
Vol 13 (S340) ◽  
pp. 155-156
Author(s):  
T. G. Priya ◽  
Jiangtao Su ◽  
Robertus Erd̎elyi
Keyword(s):  
Active Region ◽  
Active Region Noaa ◽  
Long Period ◽  
Wave Guides ◽  
Spiral Structures ◽  
Region Noaa ◽  
Umbral Oscillations

AbstractThe earlier work on the oscillatory phenomena in sunspot structures have supported in validating the detection of long-period oscillations, which are generated by the photospheric umbral response to the five minute p-mode global oscillations. We report here on the events of 3- min umbral oscillations which are detected within a duration of one hour from a single-polarity sunspot of active region NOAA 12132. The umbral oscillations that appear first around umbral boundaries is speculated to be excited by the wavefronts at the umbral-penumbral boundaries due to sub-photospheric or photospheric granular buffetings. The appearance of the wavefronts in spiral structures suggests that the wave guides are twisted. In addition, the newly formed running penumbral waves (RPWs) appears to be connected with the preceding RPWs.

Twist and Writhe of the Magnetic Flux in the Super Active Region NOAA 11429

2014 ◽  
pp. 335-348 ◽  
Author(s):  
A. Elmhamdi ◽  
P. Romano ◽  
A. S. Kordi ◽  
H. A. Al-trabulsy
Keyword(s):  
Active Region ◽  
Magnetic Flux ◽  
Active Region Noaa ◽  
Region Noaa

scholarly journals Features of Microwave Radiation and Magnetographic Characteristics of Solar Active Region NOAA 12242 Before the X1.8 Flare on December 20, 2014

2017 ◽  
Vol 57 (8) ◽  
pp. 978-987 ◽  
Author(s):  
V. E. Abramov-Maximov ◽  
V. N. Borovik ◽  
L. V. Opeikina ◽  
A. G. Tlatov ◽  
L. V. Yasnov
Keyword(s):  
Active Region ◽  
Microwave Radiation ◽  
Solar Active Region ◽  
Active Region Noaa ◽  
Region Noaa

scholarly journals Simultaneously Observational Study of Filtergrams, Velocity and Vector Magnetic Fields for a Solar Flare on 7 Oct. 1987

1989 ◽  
Vol 104 (2) ◽  
pp. 215-218
Author(s):  
Lin Yuanzhang ◽  
Zhang Hongqi ◽  
Han Feng ◽  
Liu Kening
Keyword(s):  
Active Region ◽  
Magnetic Fields ◽  
Solar Flare ◽  
Observational Study ◽  
Astronomical Observatory ◽  
Solar Telescope ◽  
Active Region Noaa ◽  
Vector Magnetograms ◽  
Region Noaa

AbstractIn this paper are described the simultaneously observational results of filtergrams, Dopplergrams and vector magnetograms for a solar flare in the active region NOAA/USAF -1862 on 7 Oct. 1987 with the solar telescope-magnctograph of Beijing Astronomical Observatory. From the analyses of these data, some conclusions were obtained.

scholarly journals TIME EVOLUTION OF CORONAL MAGNETIC HELICITY IN THE FLARING ACTIVE REGION NOAA 10930

2010 ◽  
Vol 720 (2) ◽  
pp. 1102-1107 ◽  
Author(s):  
Sung-Hong Park ◽  
Jongchul Chae ◽  
Ju Jing ◽  
Changyi Tan ◽  
Haimin Wang
Keyword(s):  
Active Region ◽  
Time Evolution ◽  
Magnetic Helicity ◽  
Active Region Noaa ◽  
Region Noaa
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