Satellite Programs & Technology Space Exploration & Science Missions

Solar Orbiter reveals cascading 'magnetic avalanches' that trigger solar flares

ESA's Solar Orbiter captured, in unprecedented detail, the precursor phase of a major solar flare, showing cascading 'magnetic avalanches'—small, initially weak magnetic disturbances that rapidly trigger large‑scale magnetic reconnection and explosive energy release. The observations identify a multiscale trigger mechanism with direct implications for improving space‑weather forecasts.

Discovered 2026-01-25T20:15:09.576079-08:00 | 2026-01-25T20:15:09.576079-08:00

Briefing

What Hype is tracking

Provides a concrete multiscale trigger mechanism for solar flares, strengthening the physical basis for space‑weather forecasts and operational warnings for satellites, GNSS and HF systems as demonstrated by the Jan. 19 X1.9 flare that produced S4/G4 impacts (source:a53b2dfe-321b-4c53-a163-fbb77a4347e5).
These high‑resolution precursor observations corroborate and extend magnetic reconnection findings from the Parker Solar Probe (source:0f6deb66-ca35-434f-8f9a-b907a1dedc92) and the stereoscopic Inouye–Solar Orbiter campaigns (source:4186a142-b172-4777-ae9d-25315d0289ea), giving modelers new constraints on timing and scale of flare onset.
Better characterization of flare triggers and particle acceleration pathways can refine radiation forecasts used to protect satellites and polar aviation routes, complementing the dataset from the recent UK probe radiation spike (source:7c48f14f-2e01-4e9b-bb80-312ee8bd451b).

Reported By

Universe Today Space.com astronomy.com Space Daily