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Physics-based space weather analysis

Turn solar risk into clear decisions.

Solar storms can disrupt satellites, power grids, navigation and communications. SKEION models the Sun’s magnetic field to show where that risk comes from. The aim: to help operators prepare, respond and explain their decisions.

Discuss a pilot project

A twisted magnetic structure (flux rope) above the Sun’s surface. Illustration.

  • 30 years of solar physics research

  • 3 Nature papers, 2 cover stories

  • Laureate of CNRS Innovation’s RISE programme (2026)

The problem

Alerts tell you a storm is coming. Not what it means for you.

Space weather services already issue bulletins and alerts. The hard part comes next: working out what an event means for a fleet, a grid or a mission.

$75.9 bn
in estimated losses avoided in the US by 2050, thanks to space weather observation. 91% of them on power grids.
Feb 2022
38 of 49 newly launched Starlink satellites lost after a geomagnetic storm raised atmospheric drag.
Mar 1989
A geomagnetic storm triggers a nine-hour blackout across Québec.

Sources: NOAA, Space Weather Next Program Cost Benefit Analysis (2026; value for society, not a market) · SpaceX (2022); Fang et al. (2022) · Hydro-Québec; Boteler (2019).

From the Sun to Earth

How a solar eruption reaches your systems.

An eruption can send a coronal mass ejection (CME) towards Earth, where it can trigger a geomagnetic storm. Our ambition: to model this whole chain, from the Sun to your infrastructure.

A CME, a cloud of magnetised plasma, usually reaches Earth in one to three days. It squeezes Earth’s magnetic shield. Illustration.
Follow the journey From the Sun to power grids6 steps Try the scenario Satellites or power grids7 steps

The offer

Explore, replay, alert.

Three services, all built on a physical model of the Sun’s magnetic field.

  1. Screen capture: magnetic field lines traced in 3D above the solar surface
    Field lines in 3D, in aiXplore. Screen capture.

    Explore

    Status: First tools

    Give your operations, engineering and management teams the same picture of solar activity: an interactive 3D view, from the Sun’s active regions to the solar wind.

  2. Illustration: the Earth, the field lines of its magnetic field and the dotted orbit of a satellite
    A satellite orbit in Earth’s magnetic field. Illustration.

    Event Replay

    Status: In development

    Replay a past solar storm and see what it did to your assets. Our first deliverable: the replay of an event of your choice, adapted with you to your grid or your satellites, to support your incident analysis, your insurance claims and your reports.

  3. Principle diagram along a time axis, not to scale: an early alert is given before the eruption, with a wide band of uncertainty. When the eruption is detected, the alert is refined and the band narrows. UNCERTAINTY ERUPTION EARLY ALERT ALERT REFINED
    Alert before the eruption, refined after. Diagram, time not to scale.

    Early Alert

    Status: Vision

    Our vision: to warn you before the eruption, not after it. We want to spot when the magnetic structure of a region of the Sun becomes unstable, then refine the alert hour by hour, with its uncertainty, for your sector, by API. More time to decide: put a satellite in a protected configuration, prepare grid operations.

In a pilot project, we explore with you how our solutions can meet your specific needs and solve your problems. From your case, we adapt and improve them so they fit the way your teams work.

Discuss a pilot project

Who it’s for

We start with satellites and power grids.

Storms also disrupt radio, satellite navigation and polar flights. SKEION is open to telecoms, defence, research and space weather agencies too.

All use cases by sector
Illustration: during a storm, the upper atmosphere inflates and slows down satellites on a low orbit
Storms heat the upper atmosphere: drag rises on low orbits. Illustration.

Satellites

Event Replay will rebuild the solar event behind a storm. Our ambition: to link it to a loss of altitude or an anomaly.

Illustration: an auroral electrojet induces an electric field in the ground and currents in a generic power network
Storms induce currents (GIC) in long power lines. Illustration.

Power grids

These currents can damage transformers. Event Replay will rebuild the solar event behind them. Our ambition: to link it to its effects on your grid.

Science and team

Built on 30 years of solar physics.

SKEION’s technology comes from MeshMHD, a physical model of the Sun’s magnetic field. The work was led by Tahar Amari at CPHT (CNRS / École polytechnique). Two of its results made the cover of Nature.

  • 2014

    The model started from four days of measurements of the Sun’s magnetic field, before a major eruption (December 2006). It rebuilt the twisted structure (a flux rope) behind it.

    Amari, Canou & Aly, Nature 514, 465 (2014) · doi:10.1038/nature13815

    Cover of Nature, 23 October 2014: “Solar storm brewing”

  • 2018

    It showed why a major eruption in October 2014 ejected nothing: a “magnetic cage” held the twisted structure in.

    Amari, Canou, Aly, Delyon & Alauzet, Nature 554, 211 (2018) · doi:10.1038/nature24671

    Cover of Nature, 8 February 2018: “Sun trap”

More on MeshMHD

The founding team.

Sofiane Amari and Tahar Amari
Sofiane Amari, Tahar Amari

Sofiane Amari

Founder — product & strategy

Computer engineer and entrepreneur. Leads product, strategy and execution.

Tahar Amari

Scientific co-founder

Director of Research at CPHT; he led the MeshMHD research.

Contact

Talk to the team.

A pilot project, a research collaboration, investment or press: tell us what you are working on. We reply within two business days.

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