193 Angstrom

January 16, 2011

When the Sun has Holes We Often Get Aurora

Two coronal holes that develop over several days stand out in this image and video clip of the Sun from SDO’s AIA instrument (Jan. 9-12, 2010). In the extreme UV wavelength of 193 Angstroms, one dark coronal hole intensifies just […]
August 28, 2011

Sunday CME – Activity on 28 August 2011

Well, it has been a fairly quiet couple of weeks since all the activity at the beginning of the month. Early in the morning of 28 August 2011, a small filament erupted with an associated B-class solar flare. Here is […]
March 7, 2012

Double Blast – Exciting Space Weather from AR11429

Sunspot group, AR11429 (Active Region), is at it again. When it first began its journey across the Earthward side of the Sun it released an M-class flare, an X-class flare and several more M flares, along with several CMEs. Early […]
May 6, 2012

AR11476 Comes into a Multicolored View

4 M-class Flares and More A new active region (AR11476) has been rotating into view during the beginning of May 2012. It has been producing CMEs and by May 5th it started releasing small M-class flares and lots of C-class […]
May 29, 2013

Giant Hole in the Solar Corona!

Aptly enough, we call these coronal holes. These dark patches in the sun million plus degree corona are areas where the solar atmosphere rapidly streams away from the sun. This stream of particles from the solar atmosphere is called the […]
August 17, 2013

M3.3 Solar Flare and a Coronal Mass Ejection

A long duration M3.3 flare with a beautiful eruption and CME! Active region AR11818 produced a flare peaking in X-ray at 18:24 UT (2:24 pm EDT). The eruption produced extended X-ray emission with another flare, ~M1.5 after the initial eruption […]
August 20, 2013

Aurora Ahead? – Filament Eruption with an Earth-directed CME

There may be a geomagnetic storm in store for Earth. Lookout aurora watchers! A filament ~50 Earths in length (~400,000 miles) erupted from the Sun’s southern hemisphere in the southwest direction around 7:24 UT (4:24 am EDT). The eruption produced […]
September 30, 2013

Spectacular Erupting Filament with Earth-directed Space Weather

A huge filament erupted from the sun producing a beautiful coronal mass ejection (CME) and solar energetic particle event. Around 21 UT, 9/29/2013 a filament erupted from the northwest quadrant of the sun. It started from the surface with a […]
October 30, 2013

A Whole Lot Happening on the Sun – In Many Types of Light

The sun has been really active lately. SDO gives us an amazing view of this activity in many different wavelengths of light. This also shows us the sun’s atmosphere in many temperatures ranging from ~4500 Kelvin or 7600 degrees Fahrenheit […]
January 28, 2014

It’s Back – AR11944 is back as AR11967

Sunspot group or active region AR11944 that gave us such a show at the beginning of the year is back. After taking its trip around the sun it has rotated onto the Earth facing solar disk and NOAA has labeled it […]
January 29, 2014

AR11967 Keeps Up Activity – More M-flares Possible

AR11967 continues to stay lively. In less than 24 hours on Jan. 28, it produced 7 M-class solar flares. The largest flare was an M4.9 at 19:00 UT. Here is a video of composite 304, 171 and 193 angstrom SDO/AIA […]
February 1, 2014

AR11967 Continues its Flaring and AR11968 Sends a CME Our Way

 There are two main active regions (ARs 11967/11968) on the sun and both are giving a moderate show. AR11967 continues to produce C- and M-level events, including an M3.0 flare at 07:14 UT Feb. 1, 2014. The region continues to show signs […]