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Solar Cycle 25, An energetic awakening of the SUN in the current solar cycle
titanicrivers
post May 13 2022, 09:52 PM
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The first “sunquake” http://soi.stanford.edu/press/agu05-98/press-rel.html of Solar cycle 25 was recorded by the SDO on May 10th 2022 as summarized in today’s (5-13-2022) SpaceWeather page https://spaceweather.com/. Some possible mechanisms underpinning “sunquake” observations are addressed here https://iopscience.iop.org/article/10.3847/2041-8213/abad2a .
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titanicrivers
post May 19 2022, 06:18 PM
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An amazing SDO video https://sdo.gsfc.nasa.gov/data/latest48.php?q=0304 from today https://spaceweather.com/images2022/19may22...r_anim_crop.gif
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titanicrivers
post Jun 4 2022, 05:09 PM
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Some interesting data plots concerning solar cycle 25 as well as historical data and future predictions of solar activity based on sunspot numbers and interplanetary coronal mass ejections (ICMEs) https://helioforecast.space/solarcycle . Data is provided by the Helio4Cast group whose informative home webpage is here https://helioforecast.space/
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titanicrivers
post Jun 20 2022, 01:09 AM
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Today’s SDO spacecraft images feature a “Man in the Sun” (below, left)! The “eyebrow” area of the left eye (arrow on right) is an amazing magnetic filament that stretches 370,000 km from end to end. One end of the filament is attached to sunspot AR3032. A video of plasma flow along the filament is presented here https://spaceweather.com/images2022/18jun22...t_anim_crop.gif.

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titanicrivers
post Jun 24 2022, 08:46 PM
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A quote from SpaceWeather.com
“WANTED: WHITE LIGHT IMAGES OF THE SUN: A wildfire in California has cut off electricity to Stanford University, home of the Solar Dynamics Observatory (SDO) data center. As a result, we are not receiving images from SDO. You can help! Readers are encouraged to submit their own full-disk white light images of the sun so we can see what the sun looks like today. Submit your images here.” https://spaceweathergallery.com/submissions/index.php
No doubt a number of UMSF members are aware and can contribute!
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titanicrivers
post Jun 28 2022, 04:26 PM
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SDO data center is back in operation today.
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titanicrivers
post Jul 26 2022, 09:55 PM
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While atmospheric balloons are not exactly unmanned spacecraft, data from Earth to Sky Calculus https://www.facebook.com/earthtoskycalculus uses balloons to measure deep space-atmospheric cosmic rays which are inversely proportional to solar activity. As solar activity of cycle 25 continues to increase measurements of cosmic rays from deep space decreases.
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titanicrivers
post Aug 15 2022, 05:56 PM
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SOHO and SDO continue to document increased solar cycle 25 activity. SpaceWeather’s page from today https://spaceweather.com/ nicely summarizes the activity of two current sunspots, AR 3076 and AR 3078. AR 3076 in the sun’s northern hemisphere exhibits ‘reverse polarity’ increasing it’s potential to explode https://agupubs.onlinelibrary.wiley.com/doi...29/2018JA025935 due to a magnetic reconnection event.
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titanicrivers
post Aug 31 2022, 09:01 PM
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Today’s interplanetary coronal mass ejection (ICME) is directed at Venus https://spaceweather.com/. While we Earthlings are safe there seems to be some uncertainty as to whether Venus will experience some increased atmospheric loss.(not that Venus will notice!). The effects of an ICME on an unmagnetized planet such as Mars and Venus are comparatively poorly understood. https://agupubs.onlinelibrary.wiley.com/doi...02/2014JA020616
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titanicrivers
post Sep 5 2022, 10:45 PM
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The CME directed at Venus (post above) arrived on September 2nd. This was 2 days before the Venus flyby of ESA’s Solar Orbiter probe https://www.esa.int/Enabling_Support/Operat...ore_Venus_flyby . Fortunately the probe was designed to survive and measure such outbursts and today appeared to have completed a successful flyby.
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titanicrivers
post Sep 24 2022, 06:39 PM
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Multiple CME’s and Mercury appear in LASCO’s C3 fov on 9-23.

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bkellysky
post Oct 1 2022, 01:17 AM
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QUOTE (titanicrivers @ Sep 24 2022, 01:39 PM) *
Multiple CME’s and Mercury appear in LASCO’s C3 fov on 9-23.

Now Venus is in the C3 view. Mercury will rejoin Venus late in October. They'll exit the view together in late November.
bob


QUOTE (bkellysky @ Sep 30 2022, 08:16 PM) *
Now Venus is in the C3 view. Mercury will rejoin Venus late in October. They'll exit the view together in late November.
bob


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titanicrivers
post Oct 2 2022, 06:18 PM
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Whoops! Thanks for the correction bkellysky!
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bkellysky
post Oct 2 2022, 09:04 PM
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QUOTE (titanicrivers @ Oct 2 2022, 01:18 PM) *
Whoops! Thanks for the correction bkellysky!

Weird thing is I thought I was going to correct you, but on the date of the C3 view, the map of transits across the C3 view didn't have Venus there yet (or just barely) and Mercury was in the view. So, I just added a later C3 photo that I knew had Venus. I hope I haven't confused this totally!
bob
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titanicrivers
post Oct 4 2022, 03:10 AM
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Using Stellarium to help identify the C3 SOHO background stars it is clear that VENUS (with Eta Virginis nearby) is the planet in C3’s field of view.
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