H- alfa Telescope Lunt 100 - chromosphere  disk (archive)	H- alfa Telescope Lunt 100 - chromosphere protuberance (archive)	Sunspot drawing archive
12-09-2025, 07:10 UT	12-09-2025, 07:11 UT

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Image archive H-alpha Coronograph, H-alpha filter - FWHM 0.6 nm
Data archive - Solar Activity and Eart´s Magnetic Mield

Deň	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
R	201	182	139	166	144			109	111		93	67
O	5	5	3	4	4			3	5		3	4
MPZ	np	sip	np	np	np	stp	np	mp	mp	np	np	np

R -  relative number: refractor Coudé 150/2250 mm, projection methodi susedwith a diameter of the Sun 25 cm npmp
O -  image quality: 1  - the worst image and 5 – the best image according to the following scale:
                                 1 – only big sunspots are visible, granulation isinvisible,
                                 2 – smaller spots are visible, sometimes the granulation also,
                                 3 – tiny spots are visible, granulation is well visible,
                                 4 – granulation and pores are well visible,
                                 5 – all details are well visible.
Observers: L. Pastorek, E. Hodálová
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EMP – Earth’s magnetic field:  H-variometer is used to register disturbance of the horizontal component of the EMP. We evaluate regularly eight 3-hour intervals between 6.00 UT of the actual day and 6.00 UT of the following day. We report the following status for the disturbance:
np -  non-disturbed,
mp - moderate disturbance,
stp - strong disturbance,
sip - severe disturbance.
Evaluated by:  I. Kuvik

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Monthly evolution of the relative number:

Webpage created by: Ivan Dorotovič ivan.dorotovic @suh.sk
Updated by: Eleonóra Hodálová eleonora.hodalova @suh.sk