Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Solar cycle 12"'
Autor:
Shinichi Watari
Publikováno v:
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-8 (2017)
Solar activity of cycle 24 following the deep minimum between cycle 23 and cycle 24 is the weakest one since cycle 14 (1902–1913). Geomagnetic activity is also low in cycle 24. We show that this low geomagnetic activity is caused by the weak dawn-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71b581f8cedfd3d048163a07d38b3161
http://link.springer.com/article/10.1186/s40623-017-0653-z
http://link.springer.com/article/10.1186/s40623-017-0653-z
Autor:
Andrey Tlatov
Publikováno v:
Advances in Space Research. 55:851-856
Our analysis of groups of sunspots since the year 1610 till indicates that the Gnevyshev–Ohl rule (GO) displays cycles of inversion with the period of 200 years. The latest inversion occurred in the Hale double cycle 22–23. Due to that, in severa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::678164ea8c340a1ff6fb5deb2421cf30
https://doi.org/10.1016/j.asr.2014.06.024
https://doi.org/10.1016/j.asr.2014.06.024
Publikováno v:
Journal of Geophysical Research: Space Physics. 119:9357-9368
On the basis of the Carte Synoptique catalogue of solar filaments from March 1919 to December 1989, we measure power spectra of detrended full-disk (FSFNs, latitudinal bands: 0∘–90∘), low-latitude (LSFNs, latitudinal bands
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::343debbc37f241961687c493ea03b66c
https://doi.org/10.1002/2014ja020304
https://doi.org/10.1002/2014ja020304
Autor:
Ken Tapping, Carly Morgan
Publikováno v:
Solar Physics. 292
This article is an update of a study (Tapping and Valdes in Solar Phys. 272, 337, 2011) made in the early part of Cycle 24 using an intercomparison of various solar activity indices (including sunspot number and the 10.7 cm solar radio flux), in whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6805b79d1a826843714c573d4988a0a7
https://doi.org/10.1007/s11207-017-1111-6
https://doi.org/10.1007/s11207-017-1111-6
Regression Analysis of Sunspot Numbers for the Solar Cycle 24 in Comparison to Previous Three Cycles
Autor:
Debojyoti Halder
Publikováno v:
JOURNAL OF ADVANCES IN PHYSICS. 4:477-483
Sunspots are temporary phenomena on the photosphere of the Sun which appear visibly as dark spots compared to surrounding regions. Sunspot populations usually rise fast but fall more slowly when observed for any particular solar cycle. The sunspot nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::257cd5b1c7e9663164a722b30467a83f
https://doi.org/10.24297/jap.v4i2.2030
https://doi.org/10.24297/jap.v4i2.2030
Publikováno v:
International Letters of Chemistry, Physics and Astronomy. 32:135-143
A compact solar flare was observed during a total solar eclipse event on 13-14 November 2012. This phenomenon is beginning in local time on November 14 west of the date line over northern Australia, and ended in local time on November 13 east of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61abb2754b0483c6067612afe3a24639
https://doi.org/10.18052/www.scipress.com/ilcpa.32.135
https://doi.org/10.18052/www.scipress.com/ilcpa.32.135
Autor:
J.-E. Solheim
Publikováno v:
Pattern Recognition in Physics. 1:159-164
The Schwabe frequency band of the sunspot record since 1700 has an average period of 11.06 yr and contains four major cycles, with periods of 9.97, 10.66, 11.01 and 11.83 yr. Analysis of the O-C residuals of the timing of solar cycle minima reveals t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfef07252b34668712359f3fe5f0d060
https://doi.org/10.5194/prp-1-159-2013
https://doi.org/10.5194/prp-1-159-2013
Autor:
V. P. Okhlopkov, Yu. I. Stozhkov
Publikováno v:
Bulletin of the Lebedev Physics Institute. 40:27-33
The current 24th solar activity cycle started in 2008 and continuing to the present is anomalous in comparison with previous cycles. Its unusual properties include a low sunspot number R z for a long time, a weak interplanetary magnetic field, a weak
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93b2bb2fd9fe4bd7bf32590804544564
https://doi.org/10.3103/s1068335613020012
https://doi.org/10.3103/s1068335613020012
Publikováno v:
International Journal of Astronomy. 1:101-104
This paper analyzed theoretically the short period variability of the sunspot activity beginning from January 2010 till September 2010. Sunspot data are taken fro m Solar Influences Data Analysis Center (SIDC). We focused on the number of sunspots ea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82282f7688354255cfb84ef4e1fd5227
https://doi.org/10.5923/j.astronomy.20120105.04
https://doi.org/10.5923/j.astronomy.20120105.04
Publikováno v:
Journal of Astrophysics and Astronomy. 33:387-397
To understand better the variation of solar activity indicators originated at different layers of the solar atmosphere with respect to sunspot cycles, we carried out a study of phase relationship between sunspot number, flare index and solar radio fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adba978bfae3f92630dec4b6af70af10
https://doi.org/10.1007/s12036-012-9153-5
https://doi.org/10.1007/s12036-012-9153-5