#Magnetosheath
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issibern.ch
How are structures in Earth’s magnetic and plasma environment, called the #Magnetosheath, formed and how do they propagate towards the Earth?

Ask ISSI International Team #627 led by Martin Volwerk & Tomas Karlsson!
👉 teams.issibern.ch/magnetosheath/ 🔭
Figure showing the bow shock and the resulting magnetosheath from a magnetohydrodynamic (MHD) simulation by the ISSI Team 627.
May 22, 2026 at 5:01 PM
vincentledvina.bsky.social
The impact from the CME has reached Earth, GOES Mag suddenly finds itself in the magnetosheath as Earth's magnetosphere becomes compressed by the energy of this solar storm. This spike does not indicate a substorm since the satellites are on Earth's dayside now.
January 19, 2026 at 7:25 PM
vincentledvina.bsky.social
Looks like we got a magnetopause crossing at GOES Mag. This just means the CME pushed Earth's magnetosphere really hard to the point where the GOES satellites at GEO (6.6 Re) were exposed to chaotic/strong magnetosheath fields.
April 15, 2025 at 6:27 PM
tusenfem.bsky.social
Having lots of science fun at @issibern.ch, discussing magnetosheath structures such as Jets, Mirror Modes and Magnetic Holes.
March 13, 2025 at 1:42 PM
jonassuni.bsky.social
My latest paper, regarding magnetosheath jet formation associated with a solar wind rotational discontinuity, is now published!

agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Magnetosheath Jets Associated With a Solar Wind Rotational Discontinuity in a Hybrid‐Vlasov Simulation
We conduct a 2D hybrid-Vlasov simulation of the interaction between Earth's bow shock and a solar wind rotational discontinuity Magnetosheath jets that form during the shock-discontinuity interac...
agupubs.onlinelibrary.wiley.com
June 10, 2025 at 6:29 AM
savvasraptis.bsky.social
Our review paper on downstream jets is out! We summarize findings from 100s of articles on how jets form at collisionless shocks, their role in planetary systems, and their space weather effects. Many questions remain to explore! Read it here: link.springer.com/article/10.1...

#Heliophysics #Space
Jets Downstream of Collisionless Shocks: Recent Discoveries and Challenges - Space Science Reviews
Plasma flows with enhanced dynamic pressure, known as magnetosheath jets, are often found downstream of collisionless shocks. As they propagate through the magnetosheath, they interact with the surrou...
link.springer.com
December 28, 2024 at 1:21 AM
nasaupdates.bsky.social
A new NASA study published in Nature suggests there may be no upper limit to how intensely Earth reacts to solar storms. For decades, scientists thought Earth's response capped out, but new data shows solar storm effects on technology could be far worse than realized. 🛰️⚡

1/4
A diagram featuring a detailed space visualization alongside two comparative line graphs. Top Right: Earth is shown surrounded by a complex network of blue magnetic field lines. Far Right: A blue, curved line denotes the “Bow shock,” which transitions into an orange-red turbulent region labeled the “Magnetosheath.” The “WIND” spacecraft is positioned far to the left in the “Solar wind” stream, connected to a label reading “Measured solar wind strength.” The “THEMIS” spacecraft sits closer to Earth inside the magnetosheath, labeled “Corrected solar wind strength.” Left Graph: Plots “Earth's response [mV/m]” against “Measured solar wind strength [mV/m].” A blue line initially follows a linear path but then flattens out, marked with the text “illusion of saturation due to measurement uncertainty.” Right Graph: Plots “Earth's response [mV/m]” against “Corrected solar wind strength [mV/m].” A pink line continues steadily upward diagonally, labeled as the “True linear response.”
September 4, 2026 at 5:35 PM
herbertgunell.se
Do magnetosheath jets cause surface waves on the magnetopause? Are the jets themselves waves? A new paper by Eva Krämer of @umeauniversitet.bsky.social throws some light on these questions:
doi.org/10.1093/mnra...

Rhinos talk about it
Rhinos talk about magnetosheath jets and their relationship to waves
June 24, 2026 at 7:30 AM
jestawarz.bsky.social
My student Harry Lewis published his second lead-author paper in #GRL! He explores how kinetic instabilities excited in localised regions by turbulent dynamics help to regulate the thermodynamics of collisionless dissipation.
#Heliophysics #Astrophysics #PlasmaPhysics

doi.org/10.1029/2024...
Turbulent Energy Conversion Associated With Kinetic Microinstabilities in Earth's Magnetosheath
We explore the interplay between turbulent fluctuations and kinetic microinstabilities using MMS in Earth's magnetosheath We measure enhanced energy conversion when plasma is susceptible to elect...
doi.org
December 16, 2024 at 1:57 PM
herbertgunell.se
There's a new review paper about the Magnetosheath Jets, and other jets, out now by Eva Krämer and others.
doi.org/10.1007/s112...
December 28, 2024 at 9:31 AM
iwf-oeaw.bsky.social
Neue #IWFGraz-Studie @natcomms.nature.com von der Redaktion als Editors' Highlight ausgewählt: Vörös, Z., Roberts, O.W., Narita, Y. et al. Turbulent dynamo in the terrestrial magnetosheath. Nat Commun 17, 2909 (2026). doi.org/10.1038/s414...

Link zum Pressetext 👇
Grazer Weltraumforscher:innen entdecken turbulenten Dynamo in der Magnetosphäre der Erde
Ein internationales Team unter der Leitung des Instituts für Weltraumforschung (IWF) der Österreichischen Akademie der Wissenschaften hat erstmals nachgewiesen, dass es in der Weltraumumgebung der Erd...
www.oeaw.ac.at
March 30, 2026 at 7:16 AM
herbertgunell.se
We wanted to find out how important magnetosheath jets really are. And in a new paper by Eva Krämer at Umeå University it is shown that jets carry about half of the kinetic energy in the quasiparallel magnetosheath of Earth.
doi.org/10.1029/2025...
Comic strip about two rhinos who find a new paper about jets in the magnetosheath, and then they learn that jets energise the magnetosheath and finally one of them says "I want to be a jet and energise the magnetosheath"
August 11, 2025 at 5:42 PM
jonassuni.bsky.social
My #EGU25 unfortunately started with a headache that made me miss the first day :(

But I will try my best to give a good talk about rotational discontinuities and magnetosheath jets tomorrow at 9:10 in room 0.94/95.
April 28, 2025 at 7:38 PM
thecelestialzoo.bsky.social
This diagram shows two plasma-ring stations at Sol–Mars L1 and low Mars orbit generating an artificial magnetotail to deflect solar wind. They create a stable magnetosheath around Mars. ⚡️
Radiation Shields
August 14, 2025 at 5:59 PM
drbwalsh.bsky.social
Magnetopause already compressed inward past geostationary orbit. GOES-18 is in the magnetosheath
November 12, 2025 at 12:46 AM
alcornews.bsky.social
Entre Terre et Soleil, un “laboratoire spatial” permet de tester la magnétogaine pour comprendre comment le vent solaire perturbe notre bouclier magnétique.
media24.fr/2026/05/01/e...
#Space #Science #Innovation #Astrophysics #Magnetosphere #Magnetosheath #SpaceWeather #NewSpace
Entre Terre et Soleil, les scientifiques testent un « laboratoire spatial » qui permettra d'étudier les champs magnétiques à très grande échelle : la magnétogaine terrestre
Une étude publiée dans Nature Communications rapporte des preuves directes d’une dynamo turbulente à petite échelle dans la magnétogaine terrestre.
media24.fr
May 1, 2026 at 7:37 PM
astromagnetism.bsky.social
Last week we submitted a study to ApJL confronting the predictions from weakly compressible MHD theory with extremely high Re simulations and in situ measurements of Earth’s high beta magnetosheath, showing agreement between theory, simulation and observations. arxiv.org/abs/2502.08883
February 20, 2025 at 3:03 PM
natureportfolio.nature.com
A paper in Nature Communications reports the discovery of magnetosheath jets existing in Jupiter’s magnetosphere, adding Jupiter to the list of planets, including Earth and more recently Mars, known to experience these jets. 🧪
Magnetosheath jets at Jupiter and across the solar system - Nature Communications
Jets have been found in Earth’s magnetosheath for two decades and, more recently, also in Mars. Yet, their universal existence in planetary magnetosheath remains an open question. Here, authors repo...
go.nature.com
January 9, 2024 at 9:09 PM
laspatcu.bsky.social
🚀 LASP at #AGU today — here’s your quick hit list:
🛰 Most Intense Space Weather Events Since 1960 | 8:30 AM–12 PM | Poster Hall
☁️ IMAP Near-Real-Time Space Weather (I-ALiRT) | 8:30 AM–12 PM | Poster Hall
🧲 Magnetic Reconnection in the Turbulent Magnetosheath (MMS) | 8:30 AM–12 PM | Poster Hall
December 16, 2025 at 2:10 PM
ivojuri.bsky.social
Unraveling the mysteries of magnetic reconnection! ⚡🔬 Research explores multi-scale reconnection processes, revealing how energy transforms in space plasmas—from Earth's magnetosphere to distant astrophysical systems. 🚀🌌

#SpacePhysics #MagneticReconnection #PlasmaScience #Astrophysics #MMSMission
https://link.springer.com/article/10.1007/s11214-023-01010-9 Breakdown of Figure 1: Overview of Earth's Shock, Foreshock, and Magnetosheath Reconnection Figure 1 consists of multiple panels illustrating how magnetic reconnection occurs in different regions near Earth's bow shock. Below is a detailed breakdown of the components: (a) Schematic of Earth's Shock, Foreshock, and Magnetosheath - Bow Shock: The boundary where the supersonic solar wind slows down and becomes turbulent. - Foreshock: The region upstream of the bow shock where backstreaming particles interact with the solar wind, generating waves and turbulence. - Magnetosheath: The region between the bow shock and Earth's magnetopause, filled with turbulent plasma. - Key Concept: Reconnection can occur in multiple locations—inside the foreshock, at the shock itself, and within the magnetosheath. (b–i) MMS Observations of a Reconnection Event in a Quasi-Perpendicular Shock - Panel (b–e): > Shows the reversal of the magnetic field and an associated electron jet, which is a signature of electron-only reconnection in the shock transition region. > Electron heating and energy conversion are observed. - Panel (h): > Displays the electron outflow jet, confirming reconnection. - Panel (i): > Illustrates the MMS trajectory through the current sheet, showing how the spacecraft captured a reconnection event. - (j, k) Illustration of Reconnection in a Quasi-Parallel Shock > Panel (j): Shows a more turbulent quasi-parallel shock structure, where numerous small current sheets exist. > Panel (k): Zooms in on a reconnecting current sheet and a magnetic null point, indicating an active reconnection region. Why It’s Important: - Demonstrates that magnetic reconnection can occur in the shock transition region, influencing energy transfer and turbulence. - Shows electron-only reconnection, which is a new discovery in shock environments and is crucial for understanding space plasma dynamics. - Helps improve models of particle acceleration, which affects space weather, etc. Breakdown of Figure 3: Figure 3 presents two MMS observation events of magnetic reconnection occurring inside foreshock transients—regions upstream of Earth's bow shock where plasma turbulence and wave-particle interactions take place. It compares cases of strong guide-field reconnection and anti-parallel reconnection (no guide field). (Left Panel: Reconnection with a Strong Guide Field) - Key Observations: > A reconnecting thin current sheet is detected inside a foreshock transient. > Electron-only reconnection is observed, meaning only electrons participate, while ions remain unresponsive. > The electron outflows (Panel c) confirm the presence of a reconnection jet. > Energy conversion (electron heating) mainly occurs along the magnetic field direction, indicating an influence of the guide field. - Implications: > Suggests that strong guide fields in foreshock transients affect energy dissipation and particle heating. > Supports the idea that turbulent reconnection can contribute to electron energization before particles cross the bow shock. (Right Panel: Reconnection Without a Guide Field – Anti-Parallel Reconnection) - Key Observations: > A reconnecting thin current sheet is detected in another foreshock transient. > Electron-only reconnection is again observed, but this time without a strong guide field. > The electron jet (Panel c) shows clear outflows along the current sheet plane, rather than along the magnetic field direction. > The current sheet is thinner (~1 ion inertial length , 𝑑𝑖), showing reconnection at small scales. - Implications: > Demonstrates that electron-only reconnection can occur in different foreshock conditions. > This reconnection type may contribute to early-stage particle acceleration before particles reach the shock. Why It’s Important: - First evidence of reconnection inside foreshock transients - Reveals electron-only reconnection - Links foreshock turbulence to shock acceleration
February 19, 2025 at 12:32 AM
sketchynews.net
[Phys.Org]Study explores magnetosheath jets on Mars - Phys.org Magnetosheath jets on Earth are plasma entities that have a higher dynamic pressure surrounding the plasma and can cause waves that transfer energy within such environments. Such jets also exist beyond Earth in the magnetosheath of...
June 14, 2023 at 3:00 PM
rasjournals.bsky.social
Published in #RASTI RAS Techniques & Instruments: "Resolving magnetosheath jet responses in soft X-ray images", Wharton et al. This is Fig. 1: please visit academic.oup.com/rasti/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Planes through the Rhybrid emissivity simulations at three different times. (a) Time = 10.6 s. (b) Time = 302.1 s. (c) Time = 598.9 s. (i) X = 11 R_E plane. (ii) Y = 0 R_E plane. (iii) Y = 0 R_E plane zoomed into subsolar magnetopause region.
August 28, 2026 at 7:59 AM
kuuke.bsky.social
BepiColombo detecteert zuurstof- en koolstofionen in de magnetosfeer van Venus

In augustus 2021 maakte de BepiColombo ruimtesonde van de ESA en JAXA zijn tweede scheervlucht langs Venus en deed daar een kortdurende waarneming van de geïnduceerde magnetosfeer.

www.kuuke.nl/bepicolombo-...
Schematische weergave van planetair materiaal dat ontsnapt via de magnetosheath-flank van Venus; de rode lijn en pijl tonen het gebied en de richting van waarnemingen door BepiColombo toen de ontsnappende ionen (C+, O+, H+) werden waargenomen. Credit: Thibaut Roger / Europlanet 2024 RI / Hadid et al.
April 15, 2024 at 6:42 PM
g7izu.bsky.social
Space Weather

First effects coming now at geostationary orbit as the magnetosheath is compressed at the Goes satellites by the CME. This first CME is not going to be the biggest.

#spaceweather
#aurora
#g7izu
GOES magnetometer plot
November 11, 2025 at 11:05 PM
spacefeed.bsky.social
🚀 The cosmos is enormous. But it's surprisingly close.

Graphic Art Venus - Day - Night drawing showing solar wind, bow…

🪐 Compare the best telescopes for 2026: https://www.telescopeadvisor.com/saturns-rings-returning-2026-telescope-guide/

#Venus #Planets #SolarSystem
ARC-1978-AC78-9464. Graphic Art Venus - Day - Night drawing showing solar wind, bow shock, magnetosheath, clouds and streamers Pioneer Venus SP-461 fig 6-28 Interaction of the solar wind with the atmosphere of Venus as termined from Pioner Venus experiments and observations
May 8, 2026 at 10:54 AM