English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Solar eruptions are the leading driver of space weather, and it is vital forspace weather forecast to understand in what conditions the solar eruptions canbe produced and how they are initiated. The rotation of sunspots around theirumbral center has long been considered as an important condition in causingsolar eruptions. To unveil the underlying mechanisms, here we carried out adata-driven magnetohydrodynamics simulation for the event of a large sunspotwith rotation for days in solar active region NOAA 12158 leading to a majoreruption. The photospheric velocity as recovered from the time sequence ofvector magnetograms are inputted directly at the bottom boundary of thenumerical model as the driving flow. Our simulation successfully follows thelong-term quasi-static evolution of the active region until the fast eruption,with magnetic field structure consistent with the observed coronal emission andonset time of simulated eruption matches rather well with the observations.Analysis of the process suggests that through the successive rotation of thesunspot the coronal magnetic field is sheared with a vertical current sheetcreated progressively, and once fast reconnection sets in at the current sheet,the eruption is instantly triggered, with a highly twisted flux ropeoriginating from the eruption. This data-driven simulation stresses magneticreconnection as the key mechanism in sunspot rotation leading to eruption.

Data-driven MHD simulation of a sunspot rotating active region leading to solar eruption