Monday, October 19, 2026

CME · Friday, October 9

M-class flares are common. Earth-directed CMEs are the filter.

Most solar fireworks are not aimed at us. The ones that are get a grid desk’s attention.

by: Andrew, Co-Founder at Blackout Briefing

The sun produces flares constantly across a cycle. The question for infrastructure is whether material was launched, how fast, and whether Earth sits in the path. An M-class flare with a partial halo CME is a weather event. An M-class flare with nothing leaving the sun is a radio event at most.

M-class flares are a regular step on the public charts near solar maximum, not a rare alarm by themselves. A flare can disturb radio on the sunlit side of Earth and still throw nothing toward us. The CME is the material that left the sun. Without an Earth-directed one, there is nothing on the way to couple into long wires later.

This week’s pattern — flares, a watch, a glancing blow — is what normal looks like near solar maximum. Normal includes occasional G2 nights and a lot of false drama on social feeds.

A glancing blow is a CME that mostly misses, with a weaker piece brushing Earth. It can still produce a watch, a modest storm, and aurora a bit south of usual. It is not something to ignore by habit, and it is not the double hit of 1859. The feed will not make that distinction. The space-weather center’s wording will.

A modest storm is something operators notice and most households should not rearrange a week around. Naming the level matters so that a later severe watch is not just another red graphic. If you only have one reaction — ignore everything, or treat everything as impact — you do not have a filter. The filter is whether material is Earth-directed, and the scale the center assigns when it arrives.

Blackout Briefing will keep the distinction. Spectacle is not impact. Impact is current on a neutral, a tripped line, a radio net that cannot pass traffic.

Spectacle is the flare clip, the aurora over a town that is pleased to see it, the notification. Impact is what the long conductors did. You can watch the first and still wait for the second before you decide the week was an event. Most weeks, the second does not come. The habit is to check, not to perform.

Sources

  1. NOAA Space Weather Scales — NOAA Space Weather Prediction Center · the article this brief was written from
  2. Space Weather: Policy and U.S. Government Roles (CRS R46049) — Congressional Research Service

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