H- alfa Telescope Lunt 100 - chromosphere  disk (archive)	H- alfa Telescope Lunt 100 - chromosphere protuberance (archive)	Sunspot drawing archive
17-09-2025, 08:30 UT	17-09-2025, 08:32 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	np	mp	sip

Deň	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
R		138
O		4
MPZ	stp	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