flare · sun · class (вспышка · солнце · класс)

A Class X solar flare of the highest magnitude was recorded on the Sun. The most powerful Class X flare occurred on the Sun, according to the Telegram channel of the Solar Astrophysics Laboratory of IRI.

Consensus

An X-class solar flare occurred on the Sun on July 1st.
The event was reported by the Laboratory of Solar Astronomy at IKI RAS.
A large sunspot group (4478) had formed earlier in June and contributed to increased solar activity.

Points of divergence

The X-class flare was preceded by a series of smaller flares, including three M-class ones, over the previous day. — kommersant
A video recording from May 7th showed an M-class flare occurring on that date at IKI RAS. — vm
The X-class flare was the first of its kind for the year and occurred during a period of high solar activity. — vesti

Coverage (3 sources)

Solar flare of highest class X recorded — Коммерсантъ
Class X Solar Flare Detected on the Sun — Вечерняя Москва
Class X Solar Flare Detected — Вести

Key entities