Prominence

June 20, 2022

Sun Activity: Week of June 20, 2022

[Alex on EARTHSKY.ORG] Some C-class flares, prominences, minor geomagnetic storm, and a beautiful CME. (Image: ESA Proba2 / SolarMonitor.org)
May 9, 2022

Sun Activity: Week of May 9, 2022

[Alex on EARTHSKY.ORG] 5/9: low sun activity; 5/10: X-flare from AR3006; 5/11: Rare magnetic crochet and CMEs; 5/12: Moderate, possible glancing CME; 5/13: Sun activity moderate; 5/14: Possible glancing CME; 5/15: Beautiful prominence eruption (Image: NOAA)
August 4, 2014

Giant Filament Staring at Earth

High above the solar surface in the hot million+ C solar corona sits a giant filament of cooler (~50,000 C), denser material, both supported and restrained by solar magnetic fields. If this filament should become unstable as they sometimes do […]
April 22, 2012

A Prominence Eruption Sends a CME to Mercury

On April 22, 2012, filament material uncurled as an erupting prominence around sunspot group AR11463. There was a C1.8 solar flare and the resulting eruption produced a SCORE-C CME detected by SOHO/LASCO C2 at 15:30 UT.
April 17, 2012

Beautiful Eruptions from the East Limb of the Sun

An eruption of plasma from just behind the solar limb observed by SDO with the 304 Angstrom camera.This shows material at temperatures around 60,000-80,000 Kelvin. This produced a CME that went out the left side (East) of the Sun starting around 2 UT. At ~1000 km/s the CME has a SCORE O (for ordinary). NASA produced a computer model predicting the CME will impact STEREO Behind on 4/17 at 7:40 UT (but not Earth).
March 14, 2012

Unidentified Sun Object is Identified! A Little Black Spot on The Sun Today

On March 12, 2012, Sunsflare posted a video asking if anyone could identify a circular object seen in SDO coronal images. The video was also posted on Facebook with the same question posed. I answered the question on Facebook but […]