Works matching Sunspots

Results: 4044

Total sunspot number calculation based on flare production potential of sunspot groups: reconstruction of SSN and its relation to some geomagnetic indices.

Published in:

Turkish Journal of Physics, 2019, v. 43, n. 2, p. 187, doi. 10.3906/fiz-1811-7

By:

KARSLIOĞLU, Ahmet Burak;
DÖNMEZ, Burçin;
KILÇIK, Ali

Publication type:

Article

Relation between Coronal Mass Ejections and Sunspot Number during Solar Cycle 24.

Published in:

Iraqi Journal of Science, 2019, v. 60, n. 8, p. 1860, doi. 10.24996/ijs.2019.60.8.23

By:

Hussein, Zeinab F.

Publication type:

Article

Sunspot Count Periodicities in Different Zurich Sunspot Group Classes Since 1986.

Published in:

Solar Physics, 2014, v. 289, n. 11, p. 4365, doi. 10.1007/s11207-014-0580-0

By:

Kilcik, A.;
Ozguc, A.;
Yurchyshyn, V.;
Rozelot, J.

Publication type:

Article

Synchronization of Sunspot Numbers and Sunspot Areas.

Published in:

Solar Physics, 2009, v. 255, n. 2, p. 289, doi. 10.1007/s11207-009-9328-7

By:

Li, K.;
Gao, P.;
Zhan, L.

Publication type:

Article

Sunspot extraction and hemispheric statistics of YNAO sunspot drawings using deep learning.

Published in:

Astrophysics & Space Science, 2023, v. 368, n. 1, p. 1, doi. 10.1007/s10509-022-04155-1

By:

Yang, Zhaoshuai;
Yang, Yunfei;
Feng, Song;
Liang, Bo;
Dai, Wei;
Xiong, Jianping

Publication type:

Article

A formula for the start of a new sunspot cycle: Relating the adjusted 10.7 cm solar flux to the start of a new sunspot cycle.

Published in:

Astrophysics & Space Science, 2020, v. 365, n. 7, p. N.PAG, doi. 10.1007/s10509-020-03800-x

By:

Geryl, P. P. A.;
Alvestad, Jan

Publication type:

Article

EXPLORE THE RELATIONSHIP BETWEEN SUNSPOT AREA AND SUNSPOT NUMBER WITH A NEW METHOD.

Published in:

Acta Geodynamica et Geomaterialia, 2024, v. 21, n. 1, p. 27, doi. 10.13168/AGG.2024.0003

By:

Juan ZHAO

Publication type:

Article

Group Sunspot Numbers: A New Reconstruction of Sunspot Activity Variations from Historical Sunspot Records Using Algorithms from Machine Learning.

Published in:

Solar Physics, 2022, v. 297, n. 1, p. 1, doi. 10.1007/s11207-021-01926-x

By:

Velasco Herrera, Víctor Manuel;
Soon, Willie;
Hoyt, Douglas V.;
Muraközy, Judit

Publication type:

Article

Revisiting the Sunspot Number.

Published in:

Space Science Reviews, 2014, v. 186, n. 1-4, p. 35, doi. 10.1007/s11214-014-0074-2

By:

Clette, Frédéric;
Svalgaard, Leif;
Vaquero, José;
Cliver, Edward

Publication type:

Article

Influence of the Change in the Relative Number of Pores in Activity Cycles on the Reconstruction of the Sunspot Index.

Published in:

Astronomy Reports, 2022, v. 66, n. 2, p. 165, doi. 10.1134/S1063772922030052

By:

Tlatova, K. A.;
Vasil'eva, V. V.;
Berezin, I. A.;
Illarionov, E. A.;
Tlatov, A. G.

Publication type:

Article

The Possibility of Observing Several Hydrogen Radio Lines in Solar Activity Features over Sunspots.

Published in:

Astronomy Reports, 2021, v. 65, n. 8, p. 705, doi. 10.1134/S1063772921080047

By:

Dravskikh, A. F.;
Dravskikh, Yu. A.

Publication type:

Article

Three-minute oscillations in sunspots: Seismology of sunspot atmospheres.

Published in:

Astronomy Letters, 2007, v. 33, n. 9, p. 622, doi. 10.1134/S106377370709006X

By:

Zhugzhda, Yu. D.

Publication type:

Article

DER AUSBRUCH DES VULKANS TAMBORA 1815 UND DIE DOKUMENTATION VON SONNENFLECKEN AM STIFT ADMONT IM RAHMEN ZEITGENÖSSISCHER METEOROLOGISCHER BEOBACHTUNGEN.

Published in:

Mitteilungen der Österreichischen Geographischen Gesellschaft, 2021, v. 163, p. 61, doi. 10.1553/moegg163s61

By:

Kellerer-Pirklbauer, Andreas;
Eulenstein, Julia

Publication type:

Article

Long-term variations in sunspot magnetic field-area relation.

Published in:

Astronomische Nachrichten, 2017, v. 338, n. 1, p. 26, doi. 10.1002/asna.201613035

By:

Nagovitsyn, Y. A.;
Pevtsov, A. A.;
Osipova, A. A.

Publication type:

Article

Study of sunspots and sunspot.

Published in:

Current Science (00113891), 2010, v. 98, n. 11, p. 1496

By:

Pandey, S. K.;
Shrivastava, Rahul;
Borkar, L. K.;
Tripathi, A. K.;
Tripathi, Aka;
Dubey, S. C.

Publication type:

Article

Possible variations in sunspot groups before flaring activity during solar cycles 23 and 24.

Published in:

Turkish Journal of Physics, 2017, v. 41, n. 4, p. 351, doi. 10.3906/fiz-1704-4

By:

KILÇIK, Ali;
ŞAHİN, Seray

Publication type:

Article

Automatic Detection of Sunspots Size and Activity using Matlab.

Published in:

Iraqi Journal of Science, 2019, v. 60, n. 2, p. 411, doi. 10.24996/ijs.2019.60.2.21

By:

Noor Alhuda Kamel;
Ahmed Abdul-Razzaq Selman

Publication type:

Article

The Rotation Rate of the Active Longitude and Sunspot Groups on It and Other Characteristics of Sunspot Groups at the End of the Descending Branch of Solar Cycle 24.

Published in:

Geomagnetism & Aeronomy, 2023, v. 63, n. 8, p. 1210, doi. 10.1134/S001679322308011X

By:

Kostyuchenko, I. G.;
Vernova, E. S.

Publication type:

Article

A Curious History of Sunspot Penumbrae: An Update.

Published in:

Solar Physics, 2018, v. 293, n. 7, p. 1, doi. 10.1007/s11207-018-1328-z

By:

Carrasco, V. M. S.;
Vaquero, J. M.;
Trigo, R. M.;
Gallego, M. C.

Publication type:

Article

Tests of Sunspot Number Sequences: 3. Effects of Regression Procedures on the Calibration of Historic Sunspot Data.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 2829, doi. 10.1007/s11207-015-0829-2

By:

Lockwood, M.;
Owens, M.;
Barnard, L.;
Usoskin, I.

Publication type:

Article

Re-examination of the Daily Number of Sunspot Groups for the Royal Observatory, Greenwich (1874 - 1885).

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 2519, doi. 10.1007/s11207-016-0856-7

By:

Willis, D.;
Wild, M.;
Warburton, J.

Publication type:

Article

The Discontinuity Circa 1885 in the Group Sunspot Number.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 2763, doi. 10.1007/s11207-015-0841-6

By:

Cliver, E.;
Ling, A.

Publication type:

Article

70 Years of Sunspot Observations at the Kanzelhöhe Observatory: Systematic Study of Parameters Affecting the Derivation of the Relative Sunspot Number.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 3103, doi. 10.1007/s11207-016-0857-6

By:

Pötzi, Werner;
Veronig, Astrid;
Temmer, Manuela;
Baumgartner, Dietmar;
Freislich, Heinrich;
Strutzmann, Heinz

Publication type:

Article

Sunspot Numbers from ISOON: A Ten-Year Data Analysis.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 3123, doi. 10.1007/s11207-016-0874-5

By:

Balasubramaniam, K.;
Henry, T.

Publication type:

Article

An Early Sunspot Catalog by Miguel Aguilar for the Period 1914 - 1920.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 2609, doi. 10.1007/s11207-016-0905-2

By:

Lefèvre, L.;
Aparicio, A.;
Gallego, M.;
Vaquero, J.

Publication type:

Article

Investigation of Sunspot Area Varying with Sunspot Number.

Published in:

Solar Physics, 2016, v. 291, n. 9/10, p. 2917, doi. 10.1007/s11207-016-1010-2

By:

Li, K.;
Li, F.;
Zhang, J.;
Feng, W.

Publication type:

Article

Re-evaluation of Predictive Models in Light of New Data: Sunspot Number Version 2.0.

Published in:

Solar Physics, 2016, v. 291, n. 8, p. 2457, doi. 10.1007/s11207-016-0965-3

By:

Gkana, A.;
Zachilas, L.

Publication type:

Article

Flaring Rates and the Evolution of Sunspot Group McIntosh Classifications.

Published in:

Solar Physics, 2016, v. 291, n. 6, p. 1711, doi. 10.1007/s11207-016-0933-y

By:

McCloskey, Aoife;
Gallagher, Peter;
Bloomfield, D.

Publication type:

Article

Sunspots During the Maunder Minimum from Machina Coelestis by Hevelius.

Published in:

Solar Physics, 2015, v. 290, n. 10, p. 2719, doi. 10.1007/s11207-015-0767-z

By:

Carrasco, V.;
Álvarez, J.;
Vaquero, J.

Publication type:

Article

Automation of Tracking Various Sunspot Group Entities and Demonstrating Its Usage on the Flaring NOAA AR 11429.

Published in:

Solar Physics, 2015, v. 290, n. 6, p. 1627, doi. 10.1007/s11207-015-0714-z

By:

Győri, L.

Publication type:

Article

Equivalence Relations Between the Cortie and Zürich Sunspot Group Morphological Classifications.

Published in:

Solar Physics, 2015, v. 290, n. 5, p. 1445, doi. 10.1007/s11207-015-0679-y

By:

Carrasco, V.;
Lefèvre, L.;
Vaquero, J.;
Gallego, M.

Publication type:

Article

Sunspot Numbers and Areas from the Madrid Astronomical Observatory (1876 - 1986).

Published in:

Solar Physics, 2014, v. 289, n. 11, p. 4335, doi. 10.1007/s11207-014-0567-x

By:

Aparicio, A.;
Vaquero, J.;
Carrasco, V.;
Gallego, M.

Publication type:

Article

Sunspot Catalogue of the Valencia Observatory (1920 - 1928).

Published in:

Solar Physics, 2014, v. 289, n. 11, p. 4351, doi. 10.1007/s11207-014-0578-7

By:

Carrasco, V.;
Vaquero, J.;
Aparicio, A.;
Gallego, M.

Publication type:

Article

Sunspot Bright Points.

Published in:

Solar Physics, 2013, v. 288, n. 1, p. 171, doi. 10.1007/s11207-013-0306-8

By:

Choudhary, Debi Prasad;
Shimizu, Toshifumi

Publication type:

Article

Chromospheric Sunspot Oscillations in Hα and Ca ii 8542 Å.

Published in:

Solar Physics, 2013, v. 288, n. 1, p. 73, doi. 10.1007/s11207-013-0286-8

By:

Maurya, Ram Ajor;
Chae, Jongchul;
Park, Hyungmin;
Yang, Heesu;
Song, Donguk;
Cho, Kyuhyoun

Publication type:

Article

A Curious History of Sunspot Penumbrae.

Published in:

Solar Physics, 2013, v. 286, n. 2, p. 347, doi. 10.1007/s11207-013-0291-y

By:

Hathaway, D.

Publication type:

Article

Direct Measurement Results of the Time Lag of LOS-Velocity Oscillations Between Two Heights in Solar Faculae and Sunspots.

Published in:

Solar Physics, 2013, v. 284, n. 2, p. 379, doi. 10.1007/s11207-013-0247-2

By:

Kobanov, N.;
Kolobov, D.;
Kustov, A.;
Chupin, S.;
Chelpanov, A.

Publication type:

Article

Solar Flare Occurrence Rate and Probability in Terms of the Sunspot Classification Supplemented with Sunspot Area and Its Changes.

Published in:

Solar Physics, 2012, v. 281, n. 2, p. 639, doi. 10.1007/s11207-012-0091-9

By:

Lee, Kangjin;
Moon, Y.-J.;
Lee, Jin-Yi;
Lee, Kyoung-Sun;
Na, Hyeonock

Publication type:

Article

A Standard Law for the Equatorward Drift of the Sunspot Zones.

Published in:

Solar Physics, 2011, v. 273, n. 1, p. 221, doi. 10.1007/s11207-011-9837-z

By:

Hathaway, D.

Publication type:

Article

An Analysis of the Sunspot Groups and Flares of Solar Cycle 23.

Published in:

Solar Physics, 2011, v. 269, n. 1, p. 111, doi. 10.1007/s11207-010-9689-y

By:

Norquist, Donald

Publication type:

Article

Increasing Lifetime of Recurrent Sunspot Groups Within the Greenwich Photoheliographic Results.

Published in:

Solar Physics, 2010, v. 262, n. 2, p. 299, doi. 10.1007/s11207-009-9419-5

By:

Henwood, R.;
Chapman, S. C.;
Willis, D. M.

Publication type:

Article

The Rotating Sunspot in AR 10930.

Published in:

Solar Physics, 2009, v. 258, n. 2, p. 203, doi. 10.1007/s11207-009-9425-7

By:

Soonyoung Min;
Jongchul Chae

Publication type:

Article

Time Series Modeling of Sunspot Numbers Using Long-Range Cyclical Dependence.

Published in:

Solar Physics, 2009, v. 257, n. 2, p. 371, doi. 10.1007/s11207-009-9390-1

By:

Gil-Alana, Luis A.

Publication type:

Article

The Long-term Behavior of the North – South Asymmetry of Sunspot Activity.

Published in:

Solar Physics, 2009, v. 254, n. 1, p. 145, doi. 10.1007/s11207-008-9284-7

By:

Li, K. J.;
Gao, P. X.;
Zhan, L. S.

Publication type:

Article

Time – Distance Modelling in a Simulated Sunspot Atmosphere.

Published in:

Solar Physics, 2008, v. 251, n. 1/2, p. 309, doi. 10.1007/s11207-008-9190-z

By:

Moradi, H.;
Cally, P.

Publication type:

Article

Simulations of Switchback, Fragmentation and Sunspot Pair in δ -Sunspots during Magnetic Flux Emergence.

Published in:

Sensors (14248220), 2021, v. 21, n. 2, p. 586, doi. 10.3390/s21020586

By:

Chang, Che-Jui;
Kiang, Jean-Fu

Publication type:

Article

Sunspot drawings at Kodaikanal Observatory: a representative results on hemispheric sunspot numbers and area measurements.

Published in:

Astrophysics & Space Science, 2020, v. 365, n. 1, p. 1, doi. 10.1007/s10509-020-3725-7

By:

Ravindra, B.;
Pichamani, Kumaravel;
Selvendran, R.;
Samuel, Joyce;
Kumar, Praveen;
Jassoria, Nancy;
Navneeth, R. S.

Publication type:

Article

A semi-automated method to reveal the evolution of each sunspot group in a solar cycle.

Published in:

Astrophysics & Space Science, 2018, v. 363, n. 12, p. 1, doi. 10.1007/s10509-018-3485-9

By:

Çakmak, H.

Publication type:

Article

The Relationships of Sunspot Magnetic Field Strength with Sunspot Area, Umbral Area and Penumbra-Umbra Radius Ratio.

Published in:

Astrophysics & Space Science, 2006, v. 306, n. 1/2, p. 23, doi. 10.1007/s10509-006-9217-6

By:

Jin, C.;
Qu, Z.;
Xu, C.;
Zhang, X.;
Sun, M.

Publication type:

Article

The Ratio of the Areas of a Sunspot and Its Umbra: Two Populations of Sunspot Groups.

Published in:

Astronomy Letters, 2024, v. 50, n. 5, p. 329, doi. 10.1134/S1063773724700178

By:

Nagovitsyn, Yu. A.

Publication type:

Article