AGU elections are open until 6 Nov! I'm glad to be on the ballot for an early career seat on the @agu.org Council. Whoever you choose, please vote agu.org/elections

I support Wikipedia, where information is still human-created, fact-checked, and 100% free. Join me! donate.wikimedia.org

Grad students in geospace science: the CGS Fellowship is open. $10-12K, great variety of research topics (including one from me). Due Oct 23: cgs.jhuapl.edu/Resources/Ag...

Thursday, October 1, 2026 - Sunday, August 1, 2027

cgs.jhuapl.edu

🙋‍If you are an AGU member who has attended an Annual Meeting in the last five years, you are eligible to volunteer for the OEP Program. Volunteers will give feedback on presenters’ draft presentations in November. You do not need to attend AGU26 yourself to volunteer. ️spklr.io/63328ET3hy

A postdoc position is available on my STFC-funded research project. Deadline 28 August 2026, start date flexible but available immediately. Enquiries welcome. More info and application: qmul-jobs.tal.net/vx/candidate...

Great GEM workshop last week in Portland, Maine. Our focus group on Multiscale Dayside Transients (MDT) ran strong sessions on how transients interact with the bow shock and magnetosphere. Thanks to all who presented, and stay tuned for our GEM challenge. gemworkshop.org

The @agu.org Annual Meeting in San Francisco is approaching! Our session on "Collisionless Shocks in Heliospheric and Astrophysical Plasmas" (SH010) is open for abstract submissions: agu.confex.com/agu/agu26/pr... #AGU26 #Heliophysics #SpacePhysics #Astrophysics

NASA’s Juno observations show relativistic electron acceleration at the bow shock of Jupiter and establish a universal scaling law linking shock size to maximum cosmic ray energy, according to a paper in Nature. go.nature.com/49ArfuL 🔭🧪

Forecasting space weather, from routine and quiet to rare and extreme, requires tracking conditions across tens of millions of kilometers of interplanetary space, write @savvasraptis.bsky.social and colleagues @jhuapl.bsky.social. eos.org/science-upda...

Vast Space, Sparse Data: An AI Answer to Twin Space Weather Challenges - Eos

Modern machine learning and AI methods can help heliophysics researchers and space weather forecasters overcome limitations from a dearth of observations and the infrequency of extreme events.

eos.org

New article in @agu.org's EOS out today! Space is huge and our data is sparse, while extreme events are rare. So how do we forecast space weather reliably? AI and ML are part of the answer! Read it: eos.org/science-upda... #SpaceWeather #Heliophysics

Vast Space, Sparse Data: An AI Answer to Twin Space Weather Challenges - Eos

Modern machine learning and AI methods can help heliophysics researchers and space weather forecasters overcome limitations from a dearth of observations and the infrequency of extreme events.

eos.org

NASA’s Juno observations show relativistic electron acceleration at the bow shock of Jupiter and establish a universal scaling law linking shock size to maximum cosmic ray energy, according to a paper in Nature. go.nature.com/49ArfuL 🔭🧪

Nature research paper: Relativistic electron acceleration at the bow shock of Jupiter and beyond go.nature.com/49GdTx4

Relativistic electron acceleration at the bow shock of Jupiter and beyond - Nature

NASA’s Juno observations show relativistic electron acceleration at the bow shock of Jupiter and establish a universal scaling law linking shock size to maximum cosmic ray energy.

go.nature.com

New in @nature.com : Using #NASA 's Juno and JEDI instrument from @jhuapl.bsky.social we show Jupiter's foreshock accelerates electrons to near light speed. Using our solar system observations, we built a scaling law from planetary shocks to supernova remnants. www.nature.com/articles/s41...

Relativistic electron acceleration at the bow shock of Jupiter and beyond - Nature

NASA’s Juno observations show relativistic electron acceleration at the bow shock of Jupiter and establish a universal scaling law linking shock size to maximum cosmic ray energy.

nature.com

What is Smile set out to discover? This groundbreaking mission will observe Earth’s magnetosphere in X-rays while capturing the northern lights in ultraviolet, offering an entirely new way to see how our planet defends itself from solar storms. 🔭 🧪 ☀️

I support Wikipedia, where information is still human-created, fact-checked, and 100% free. Join me! donate.wikimedia.org

Smile begins her mission! 🙌 The Inspector is on her way to reveal how exactly Earth’s invisible shield protects us against the solar wind! www.esa.int/Science_Expl... 🔭 🧪 ☀️

Earth's bow shock has two faces: peaceful (quasi-perpendicular) and chaotic (quasi-parallel). The magnetosheath holds the clues to understand its processes! Our team needs your help on @zooniverse.bsky.social Intro: youtu.be/4MWU7GDIlgs Join: zooniverse.org/projects/vickitoyedens/shock-detectives

Shock Detectives

YouTube video by APL Webinars and Events

youtu.be

Our latest work is now summarized in ESA Solar Orbiter Science Nugget #88! We compared foreshocks of interplanetary and planetary shocks using Solar Orbiter + NASA MMS. see the science nugget at : www.cosmos.esa.int/web/solar-or... #ESA #NASA #SolarOrbiter #Heliophysics #PlasmaPhysics

Looking for a PhD position in solar system science? Consider coming to work with me, @interplanetary.bsky.social and @mathewjowens.bsky.social! We have a project on Solar Wind - Magnetosphere Coupling at the Giant Planets. www.findaphd.com/phds/project... #heliophysics#aurora#spaceweather

Solar Wind – Magnetosphere Coupling At The Giant Planets at University of Reading on FindAPhD.com

PhD Project - Solar Wind – Magnetosphere Coupling At The Giant Planets at University of Reading, listed on FindAPhD.com

findaphd.com

⏳ One week left to submit a session, town hall, or scientific workshop proposal for #AGU26! 🗣️➡️ Add your voice to the conversation at AGU26: Where Science Connects. Submit a proposal by 22 April: buff.ly/1sPRVfF

Why foreshocks of IP shocks and Earth's bow shock look different? In our new paper, we show that they initiate the same way, but observational constraints and global shock geometry get in the way. Read the full study here: doi.org/10.3847/2041... #Heliophysics #MMS #SolarOrbiter

Compressive Structures in the Foreshock of Collisionless Shocks

Compressive Structures in the Foreshock of Collisionless Shocks, Raptis, Savvas, Trotta, Domenico, Turner, Drew L., Blanco-Cano, Xóchitl, Hietala, Heli, Karlsson, Tomas, Jebaraj, Immanuel Christopher,...

doi.org

New paper out in Science Advances addressing a long-standing open question: what is maximum energy of particles in radiation belts? A simple model shows a universal energy limit of 7 ± 2 TeV, with implications for cosmic rays. doi.org/10.1126/scia... #Heliophysics #Astrophysics #SpaceScience

Universal energy limits of radiation belts in planetary and brown dwarf magnetospheric systems

Exoplanetary and brown dwarf radiation belt systems may contribute significantly to observed cosmic ray spectra up to several TeV.

doi.org

Shout-out to @alexwitze.bsky.social for being included in @merriam-webster.com's definition for "heliophysics" (which has long been a word, but is now a *recognised* word)

#AGU25 starts tomorrow! I'll be around all week! Hope to see many people there and catch up👋!

NASA just selected @jhuapl.bsky.social Developed CINEMA Mission! www.nasa.gov/news-release... ! 🥳

NASA Selects Two Heliophysics Missions for Continued Development - NASA

NASA has selected one small explorer mission concept to advance toward flight design and another for an extended period of concept development.

nasa.gov

NASA has selected Dartmouth College and Johns Hopkins APL to begin development on CINEMA, a mission to improve our understanding of the growing impacts of space weather. https://jhuapl.link/8cb

NASA Selects Johns Hopkins APL-Developed CINEMA Mission to Study Space Weather

CINEMA, a mission to improve understanding of the growing impacts of space weather, has been competitively selected by NASA for development.

jhuapl.link

Join in for our first EHC HelioMeet seminar today! Looking forward to seeing you there! www.heliophysics.eu/heliomeet

EHC - HelioMeet

HelioMeet - an EHC seminar series Come for the interdisciplinary science — stay for the behind-the-scenes insights into navigating scientific life in the heliophysics community. HelioMeet is a semin...

heliophysics.eu

This is how it feels right now...

A huge thanks to all participants for making the 3rd LMAG25 workshop a success! For anyone who wants to revisit the talks: The final program & presentation recordings are now available on our site: www.lmag25.com/presentations #geospace #heliophysics #machinelearning

Yesterday I joined remotely a space weather AI/ML panel at #ESWW2025 in Umeå as a giant face on a screen. Key takeaways: We need less hype, more rigor. Better validation, standardized benchmarks, and open access to models/data. Hope to join in-person next year😀!