Obituary: Wasaburo Unno (1925 – 2023). #SolarPhysics 298, 143 (2023). doi.org/10.1007/s11207… Wasaburo Unno, professor emeritus of the University of Tokyo and best known for the Unno–Rachkovsky formula for the Zeeman effect, passed away on 07 November 2023, at the age of 98.

I guess it's been a while since my last tweet, but I thought I would chime in with this exciting AGU (American Geophysical Union) Geophysical Monograph Series volume, published by Wiley. So proud to be a part of it! wiley.com/en-us/Heliciti…

NOAA AR 13590 looks rather nasty, with at least two major magnetic polarity inversion lines but not as nasty as to produce a great X6.3 flare back-to-back to an M5 one! ESA Space Weather A-EFFort underestimated the odds. The Sun never stops surprising us.

Some interesting Q&A on the recent AGU (American Geophysical Union) book on Helicities in Geophysics, Astrophysics and Beyond in the most recent AGU's Eos Editor's blog. An interesting read: eos.org/editors-vox/th…

A thriller, no doubt, due to clouds, but we managed to view the eclipse earlier today from northwest of San Antonio, TX, right on the totality path. The amateur picture below is from my phone camera - professional lenses worked wonders! A majestic, approx. 4'30" spectacle!

NOAA AR 13644 is a rare sight - I haven't seen anything like that since Sep 2017, with two X5+ flares within 4 days. With a huge Beff of the order 6 kG and a 1-8 A background at middle M-class, all bells of ESA Space Weather A-EFFort service are off - expect major activity!

Manolis Georgoulis Scott McIntosh ESA Space Weather

As far as ESA Space Weather A-EFFort is concerned, this is terra incognita. I have never seen such a large Beff-value (7+ kG) in an active region since the service's commencement in 2015. Not necessarily a guarantee of extreme activity, but I would expect some from NOAA AR 13664.

NOAA AR 13664 is indeed a Carrington-level region. Strong statement, but there's more: while it can easily launch X5+ flares for a couple of days now, it stays at low X-class with a series of CMEs. What is more important to relax - flaring or shedding helicity away? More to see..

On top of all this excitement with solar flares and eruptions, I should mention how humbled I feel being acceded officially as a Corresponding Member of the International Academy of Astronautics at Embry-Riddle Univ during the 4th IAA/SSA Conf! Pledge to work to honor this election!

Finally, a GOES X5.7 from NOAA AR 13664 in the early morning hours (UT) of May 11. Still way below what this active region can give! As mentioned already, this will be a long weekend geomagnetically.

Join scientists around the world at #COSPAR2024 to share, learn & discuss every space topic under (and over) the Sun. But also, explore the wonders of Busan, Korea🇰🇷 Join us. Regular registration closes 3 June ☀️✍🏼➡️ cospar2024.org

An excellent COSPAR 45th Scientific Assembly in Busan last week, organized by a very proud LOC led by James Park. Settings in the southern coast of Korea equally amazing. Honored to give a well-attended talk on the future of Heliophysics missions (photo credit: Shangbin Yang).

A helicopter airlifts #Sunrise_III’s hardware components from the landing site to #NormanWells, a small town by the Mackenzie River. Here you can see the box that held the post-focal instrumentation flying away. The main mirror of #Sunrise_III’s #telescope travelled IN the heli.

Unfortunately, the account of SWATNet - Space Weather Awarness Training Network has been compromised and thus is not accessible any more by the editors. We could not restore the access which is a big loss for us. But we still want to engage with you, 530 followers, on the X platform!

STOP! Going to #AAS245 in DC? Before you make your travel plans, ask yourself: do you want to learn how to provide excellent peer-review? If yes then join our Peer review training provided by AAS journal editors!! Join us the morning of Sunday, Jan 12!

Parker Solar Probe has phoned home! After passing just 3.8 million miles from the solar surface on Dec. 24 — the closest solar flyby in history — we have received Parker Solar Probe’s beacon tone confirming the spacecraft is safe. go.nasa.gov/4fIKuTe

Beacon has been received - spacecraft is safe! Way to go, Parker Solar Probe!