Słońce SDO 25.12.2021

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tafig
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Słońce SDO 25.12.2021

Post autor: tafig »

Słońce dzisiaj świątecznie ubrane w plamy. Zaawansowani obserwatorzy mogli dostrzec 6, 7 grup w nich ponad 50 plam. Mimo iż pogoda dzisiaj dopisała to seeing był u mnie słaby i widziałem tylko dwie największe grupy. Przy obserwacji dzisiaj nie pomagał mróz niemal dwucyfrowy. Tak więc sprawdzamy co tam na SDO. Na portalu Solar Monitor zapisane jest zapisano aż 9 grup. Wszystkich tutaj nie będę wymieniał, wymienię tylko te najobszerniejsze i najciekawsze.
obrazek

Jak widzimy na załączonym obrazku z kamery SDO jedną z najciekawszych grup wydaje się grupa 12916 zawierająca 400 mln. części tarczy słonecznej, druga z największym obszarem to 12918 zawierająca obszar 140 mln. części tarczy słonecznej. Mamy jeszcze grupę 12907 zawierającą 200 mln. części tarczy słonecznej jednak ta grupa znajduje się już na skraju zachodniego brzegu tarczy. Poniżej pozostałe grupy.
GSDO25122021.jpg
Komentarz ze strony SIDC
COMMENT: Solar activity was at low levels over the past 24 hours with ten
C-class flares. There are eight numbered active regions on the visible
disc. The most complex one remaining NOAA 2907 (beta-gamma), which has
decreased its level of activity to only three C-class flares and is now
approaching the west limb. The strongest flaring activity over the past 24
hours was a C5.2-class flare with peak time 12:12 UTC on Dec 24th produced
by NOAA 2908 (beta), which underwent a decay, decreasing its area and
trailing spots number. NOAA 2016 (beta) and NOAA 2918 (beta) showed
significant grow, increasing their number of trailing spots, and produced
low C-class flaring activity. NOAA 2911 has decayed into plage. The X-ray
flare activity is expected to be at low levels for the next 24 hours with a
30% chance for M-class flaring.

No Earth-directed coronal mass ejections (CMEs) were detected in the
available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours and is expected to remain so in the next 24 hours. The greater than
2MeV electron flux was oscillating around the 1000 pfu threshold and is
expected to sporadically exceed the 1000 pfu threshold over the next 24
hours. The 24h electron fluence was at moderate levels and is expected to
be at the border of moderate to nominal levels over the next 24 hours.

Over the past 24 hours all solar wind parameters (ACE and DSCOVR) continued
their return to background slow solar wind conditions. The solar wind speed
varied in the range of 408 km/s to 500 km/s. The interplanetary magnetic
field was at background levels with values between 1.8 nT and 6.2 nT. The
Bz-component varied between -5.4 and 3.9 nT. The polarity of the magnetic
field remained predominantly in the negative sector until midnight on Dec
24th when another rotation in the magnetic field was detected, potentially
reflecting the passage of a magnetic cloud related to the CME from Dec
20th. The solar wind parameters are expected to continue their decline
towards background solar wind conditions. An equatorial positive polarity
coronal hole has crossed the central meridian and the related high-speed
stream (HSS) is expected to influence the Earth from Dec 28th onwards on
top of the HSS from the extension of the positive polarity northern polar
hole, which is expected to reach the Earth on Dec 27th.

The geomagnetic conditions over the past 24 hours were mostly quiet with
isolated unsettled periods caused by the passage of the solar wind
structure. Mostly quiet geomagnetic conditions are expected for the next 24
hours with remaining possibility for isolated unsettled periods. Quiet
conditions are expected to prevail until the expected arrival of the next
HSS on Dec 27th.
TODAY'S ESTIMATED ISN : 126, BASED ON 05 STATIONS.

SOLAR INDICES FOR 24 Dec 2021
WOLF NUMBER CATANIA : ///
10CM SOLAR FLUX : 126
AK CHAMBON LA FORET : 012
AK WINGST : 006
ESTIMATED AP : 005
ESTIMATED ISN : 115, BASED ON 10 STATIONS.
Właściciel i administrator forum i strony SOS PTMA.
Koordynator Sekcji Obserwacji Słońca PTMA
TN 114 x 900 z wytrawionymi lustrami okular UWA 9mm
TN 200 x 1000
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