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Solar Cycle 25, An energetic awakening of the SUN in the current solar cycle
titanicrivers
post Oct 22 2023, 09:02 PM
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Solar cycle 25 currently is experiencing a lull in sunspot activity but is likely not at it’s peak (now forecast for 2024-2025). https://www.swpc.noaa.gov/products/solar-cycle-progression. The sunspot lull is usually a temporary fluctuation occurring commonly even in strong solar cycles. https://www.swpc.noaa.gov/news/low-solar-ac...ikely-20-22-oct.
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titanicrivers
post Dec 11 2023, 06:31 PM
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Large sunspots spotted by Mars Perseverance rover https://spaceweather.com/images2023/11dec23/frommars.jpg today. A small comet approaching the sun on yesterday's and today's SOHO C3 video images. https://soho.nascom.nasa.gov/data/Theater/ is cool too!
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titanicrivers
post Dec 12 2023, 08:31 PM
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Another view of the Kreutz sungrazer comet from yesterday was captured by the Cactus software which autonomously detects CMEs in image sequences from the LASCO instrument on board SOHO. https://www.spaceweatherlive.com/en/solar-a...-cmes.html#45-3
Edit: Scroll down to 2023/12/11 -21:12 after clicking above link.
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titanicrivers
post Dec 14 2023, 07:56 PM
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Today, enlarging and complex sunspot 3514 produced the most powerful solar eruption, (a strong X2.8-class solar flare) of Solar Cycle 25. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash https://spaceweather.com/images2023/14dec23..._teal_anim2.gif
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titanicrivers
post Jan 23 2024, 08:03 PM
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An interesting ‘sympathetic solar flare’ https://spaceweather.com/images2024/23jan24/doubleflare.gif (a pair of flares that occur almost simultaneously in different active regions, not by chance, but because of some physical connection) was recorded by the Solar Dynamic Observatory today (1-23-2024).

The flares erupted from two active sunspot groups (AR3559 and AR3561) shown here: https://spaceweather.com/images2024/23jan24/hmi1898.gif

Two papers explaining characteristics of sympathetic solar flares and their relationship to sunspot numbers and solar cycle strength are found here: https://iopscience.iop.org/article/10.1086/340945/pdf and here: https://link.springer.com/article/10.1007/s10509-022-04145-3

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titanicrivers
post Jan 29 2024, 10:57 PM
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It is raining protons! While not as massive as the barrage mentioned by Juramike early in this topic http://www.unmannedspaceflight.com/index.php?showtopic=6715), we are currently in the midst of a solar proton ‘storm’ https://spaceweather.com/images2024/29jan24/halocmeSOHO.gif courtesy of an eruption (flare) of a departing sunspot group AR3559 . Protons accelerated by the flare are now following the ‘Parker Spiral’ toward Earth and raining down on our atmosphere. The ‘Parker Spiral’ solar magnetic field effect is demonstrated here https://spaceweather.com/repeat_images/parkerspiral2.png.
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titanicrivers
post Feb 24 2024, 07:27 PM
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Large sunspot AR3590 currently facing earth has produced multiple X class solar flares over the last few days, including the strongest (X6.3) flare of solar cycle 25 (see link below). As per SpaceWeather today https://spaceweather.com/ this was not responsible for the 12-hour outage of AT&T's network on Thursday 2/22/2024. https://www.swpc.noaa.gov/products/goes-x-ray-flux

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titanicrivers
post Mar 9 2024, 05:42 PM
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The latest data for Solar Cycle 25 regarding sunspot number and F10.7cm radio flux progressions are found here: https://www.swpc.noaa.gov/products/solar-cycle-progression. Both data plots continue to show a strong cycle with the radio flux data especially exceeding prediction values.
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titanicrivers
post Mar 16 2024, 08:20 PM
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Solar flare activity associated with sunspot AR 3599, has produced an earth polar cap absorption event
https://www.windows2universe.org/spaceweather/polar_com.html.
Another region of the sun is producing M class solar flares https://spaceweather.com/images2024/16mar24/m4_teal_anim.gif , the origin of which is not quite visible as yet (but is rotating into view over the next 2 days).
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titanicrivers
post Mar 18 2024, 04:31 PM
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The new active sunspot group, associated with the M class X-ray flares noted in post above, has rotated into view. (See animated gif below). Images are from the Solar Dynamics Observatory https://sdo.gsfc.nasa.gov/mission/

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titanicrivers
post Mar 23 2024, 08:39 PM
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A ‘sympathetic’ https://iopscience.iop.org/article/10.1086/340945/pdf, X1.12 class, solar flare was recorded today by Nasa’s Solar Dynamic Observatory. https://spaceweather.com/images2024/23mar24...eflare_teal.gif. Two sunspots AR3614 and AR3615 appear to be involved. The flare has produced a halo CME https://spaceweather.com/images2024/23mar24/halocme.gif which is Earth directed. A good description of the events appear here https://www.spaceweatherlive.com/en/news/vi...rected-cme.html as well as in today’s SpaceWeather page. https://spaceweather.com/. A moderate geomagnetic storm is predicted. https://www.swpc.noaa.gov/news/geomagnetic-...4-25-march-2024.
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titanicrivers
post May 9 2024, 09:52 PM
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The SUN sports a VERY large sunspot (AR3664) which has been compared to the Carrington sunspot of 1859 in size and configuration. The Carrington sunspot caused geomagnetic storms that set fire to telegraph offices and sparked auroras from Cuba to Hawaii. AR3664 has produced multiple CMEs that are Earth directed and expected to produce a severe geomagnetic storm on May 11th.

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titanicrivers
post Jun 2 2024, 08:08 PM
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The sun’s face from June 2 2024 shows impressive sunspot activity including multiple X-class flares from sunspot 3697 in the last 36 hours. This sunspot, previously named 3664, is the one that produced the geomagnetic storm of May 10-11th.

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titanicrivers
post Jul 1 2024, 05:20 PM
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A new prediction method https://testbed.swpc.noaa.gov/products/sola...on-experimental has been used by the NOAA/NWS Space Weather Prediction Center updating the forecast for cycle 25. The figure shows the update that incorporates the observed sunspot count and F10.7 cm radio flux values.

Another interesting post by an amateur astronomer "Six months of sunspots", taken by Eduardo Schaberger Poupeau on June 30, 2024 @ Rafaela, Provincia de Santa Fe, Argentina can be found here: https://spaceweathergallery2.com/indiv_uplo...pload_id=209885. His composite figure of the sun's spotted face was obtained by combining Solar Dynamics Observatory images over the last 6 months.
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Floyd
post Jul 1 2024, 09:56 PM
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Thanks titanic rivers for keeping us up to date on our active neighboring star


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