iiinova — where your digital self keeps evolving

Reposted by Chitradeep Saha

Mathew Owens @mathewjowens.bsky.social · 30/09/2026

The paper describing the new solar wind modelling framework, SURF (which includes HUXt) is published. The code is up on github and will be installable from conda and pypi in a week or so. link.springer.com/article/10.1...

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Reposted by Chitradeep Saha

Christian Möstl @chrisoutofspace.bsky.social · 22/09/2026

Amazing new reconstruction of sunspot number for the last ~1000 years by Saha et al. 2026: link.springer.com/article/10.1...

Sunspot number since the year 971, showing several long minima and the recent, more regular solar cycles

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Reposted by Chitradeep Saha

CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 20/09/2026

How can we know what the Sun was like well before the age of telescopes and scientifically accurate instruments? The Earth itself is an instrument! In particular, the trees and ice sheets act as an old directory full of archived data and records. They ARE the observatory. 🔭🧪

link.springer.com

Physics-Constrained Reconstructions of Sunspot Number from Millennial-Scale Annual Heliospheric Modulation Potential - Solar Physics

Long-term solar magnetic variability governs the space climate conditions. These variations also modulate the galactic cosmic ray influx reaching Earth and subsequently regulate the production of cosm...

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Chitradeep Saha @deephysics1729.bsky.social · 18/09/2026

Grateful to mathewjowens.bsky.social for asking the question, "were solar cycles different in the past?", which culminated to this first step of finding the answer.

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Chitradeep Saha @deephysics1729.bsky.social · 18/09/2026

While the new record broadly corroborates with our current understanding of the host star, it potentially reveals important insights into extreme solar activity phases including Grand Solar Minima (GSMs).

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Chitradeep Saha @deephysics1729.bsky.social · 18/09/2026

The new method utilises a Bayesian inversion technique constrained by a suit of Physics-based models to yield more reliable estimates of Space Climate conditions over the last ~1000 years, and of course this can be extended further back.

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Chitradeep Saha @deephysics1729.bsky.social · 18/09/2026

We at @unirdg-met.bsky.social @uniofreading.bsky.social along with a team of international colleagues have devised a novel method that contributes to reconstructing the past millennial scale Space Climate from ancient tree wood samples. Check out our new paper link.springer.com/article/10.1...

Time series of reconstructed annual sunspot number and open solar flux over the last millennium

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Reposted by Chitradeep Saha

Mathew Owens @mathewjowens.bsky.social · 11/08/2026

This is our first ever genuine forecast driven by in situ observations (and coronagraphs for the CME). It ain't perfect, but it's promising.

Time series plots of observed (real-time) solar wind speed, density and temperature, alongside model forecasts. There's reasonable agreement, particularly in the CME arrival time.

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Reposted by Chitradeep Saha

uksolarphysics.bsky.social @uksolarphysics.bsky.social · 23/06/2026

New UKSP nugget #142 142. Awakening of the sleeping Sun: is there a threshold polar flux that triggers recovery from grand solar minima? Link: UKSP Nuggets are published on a monthly basis highlighting solar physics research led from the UK. Regards, Sargam Mulay (sargam.mulay@glasgow.ac.uk) and…

uksolphys.org

New UKSP nugget #142

142. Awakening of the sleeping Sun: is there a threshold polar flux that triggers recovery from grand solar minima? Link: UKSP Nuggets are published on a monthly basis highlighting solar physics research led from the UK. Regards, Sargam Mulay (sargam.mulay@glasgow.ac.uk) and Alexander Russell (ar51@st-andrews.ac.uk)

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Reposted by Chitradeep Saha

Dr. C. Alex Young @thesuntoday.bsky.social · 21/06/2026

🌟 Happy Solstice Day! The Sun's turn has begun — now heading south again. 🌅 The twist: the latest sunset still hasn't happened! ☀️ 🍓 The full Strawberry Moon (June 29) rides the LOWEST arc of the year up north — big & golden on the horizon! 🔗 bit.ly/june-solstice-2026 #JuneSolstice2026

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Reposted by Chitradeep Saha

Dr Tamitha Skov @tamithaskov.bsky.social · 17/03/2026

The new #SpaceWeatherWoman forecast is up! Learn the details of the coming Earth-directed solar storm, watch flare fireworks of Region 4392, including the big blast wave during the M2.7-flare, & see why aurora chasers cheer, while radio & GPS operators frown www.patreon.com/posts/153236659

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Reposted by Chitradeep Saha

Mathew Owens @mathewjowens.bsky.social · 08/01/2026

If you need to reconstruct the solar wind -- for example, to understand coronal mass ejection propagation to Earth -- you might be better off ditching coronal models and using real solar wind observations to constrain your model. agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Plots of a solar wind simulation for the May 2024 storms. There is good agreement with the available observations.

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Chitradeep Saha @deephysics1729.bsky.social · 02/12/2025

Thanks again, Matt! Grateful to be here for my journey ahead.

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Chitradeep Saha @deephysics1729.bsky.social · 02/12/2025

This is one of those precious moments that makes you feel at home, no matter how far away you are. Heartfelt thanks to you, Matt, for sharing my joy, for spreading warmth and happiness. @mathewjowens.bsky.social

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Chitradeep Saha @deephysics1729.bsky.social · 07/10/2025

Bruh! Every new day since I moved to the UK, it feels like I've finally managed to understand different accents, but guess what, I ended up paying extra in the grocery shop last evening, cause I replied with a "no" when the cashier asked if I had a membership card. I HAD it with me! 👀

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Reposted by Chitradeep Saha

Mathew Owens @mathewjowens.bsky.social · 04/10/2025

Looking good for Observe The Moon night at @uniofreading.bsky.social

Building in foreground. Moon at twilight in background

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Chitradeep Saha @deephysics1729.bsky.social · 22/09/2025

Reached a new continent, started a new job, exploring new places and its people! Grateful to everyone who supported throughout 🙏🏻 A journey towards new beginnings yet unwritten...

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Chitradeep Saha @deephysics1729.bsky.social · 12/09/2025

Absolutely agree! "We can't assume that a clear Sun means no space weather". Auroral activity record during the MM 👇🏻 ; quite frequent and significant 🤔

Sunspot data: SILSO; auroral data: Wang+ (2021)

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Chitradeep Saha @deephysics1729.bsky.social · 19/08/2025

The pleasure will be mine, Chris! I am also looking forward to meeting you all!

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Reposted by Chitradeep Saha

Mathew Owens @mathewjowens.bsky.social · 18/08/2025

Exciting times! We're going to be looking at the long-term (centennial to millennial) evolution of solar activity.

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Chitradeep Saha @deephysics1729.bsky.social · 18/08/2025

Here I quietly place my first post here. Delighted to note that I am going to join as a Postdoctoral Research Assistant at the @unirdg-met.bsky.social Space Physics group with @mathewjowens.bsky.social Visa just arrived, ticket is booked! Count down starts...

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