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#cme

3 posts3 participants1 post today

The Sun spat out a long duration Coronal Mass Ejection (CME) starting at around 1900Z on 30Aug2025.

This NOAA SWPC ENLIL model predicts an arrival at earth at 2100Z 1Sep2025. That's 9am on 2Sep2025 for New Zealand which make the chances of seeing aurora here pretty low. Observers at lower longitudes may have more luck.

However, the duration of the flare may mean that any aurora on earth last longer than usual.

#CME #aurora

swpc.noaa.gov/products/wsa-enl

Long-duration M2.7 solar flare launches Earth-directed CME, impact expected late on September 1

A long-duration solar flare measuring M2.7 at its peak erupted at 20:02 UTC on August 30, 2025. The eruption produced an asymmetric full halo coronal mass ejection (CME), with impact expected late on September 1 into September 2. A G3 – Strong geomagnetic storm watch is in effect. #spaceweather ##CME #solarflare
watchers.news/2025/08/31/long-

m2.7 solar flare august 30 2025 f
The Watchers · Long-duration M2.7 solar flare launches Earth-directed CME, impact expected late on September 1By Teo Blašković

Space Weather

An X1.1 flare erupted from a new active region on the east limb, peaking at 15h20 UT 28 Mar (not 15h35 UT as previously stated).

After 1.5 hours the XRay flux is still above M-level, but is falling. The flare appears to be a filament eruption.

An R3 radio blackout affected the Caribbean, Central America and northern S America.

10cm, type II and type IV radio emissions and a coronal mass ejection were observed.

This flare marks the end of couple of fairly quiet weeks on the sun!

#spaceweather
#cme

"G3 (Strong) Geomagnetic Storm Watch for 23 Mar" by NOAA Space Weather Prediction Center - The Sun erupted a coronal mass ejection (CME) expected to reach Earth on March 23 UTC at G3 storm level. That means forecasted Kp=7 for aurora down to Oregon, Idaho, Wyoming, Nebraska, Iowa, Illinois, Indiana, Ohio, Pennsylvania, New York and Massachusetts. spaceweather.gov/news/g3-stron #astronomy #aurora #AuroraBorealis #AuroraAustralis #CME #SpaceWeather

Continued thread

#SpaceWeather 📆 January 6, 2025

The #sun ☀️ has 11 numbered #sunspot regions on its Earth-facing side.
Next 24 hours: The chance for C flares is 99%, the chance for M flares is 75%, and the chance for X flares is 25% today.
Next expected #CME: A coronal mass ejection from January 4 is expected to glance Earth today. earthsky.org/sun/sun-news-acti

EarthSky | Updates on your cosmos and world · Sun news: Sun flaring low. Auroras’ last gasp?