[Alex on EARTHSKY.ORG] There’s been a small uptick in solar activity over the past two days (December 20 and 21, 2021). The increase comes from the fact that nine sunspot groups (active regions or AR) now pepper the visible face of the sun.
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UPDATE #4 (13:30 UT 9/13)) – The storm is subsiding but beautiful aurora were had by many. Even down to the northern US like Maine. “I took the picture from Casco, Maine, facing north towards the Presidential Range in New Hampshire,”
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
Two new active regions could bring solar activity, one numbered (AR11589) and one not yet on the solar disk. Based on recent activity M class flares are possible from both. The region just over the limb produced an M1
Possible Moderate to Severe Geomagnetic Storm Sunspot group, AR11520, produced an X1.4 solar flare, peaking in the NOAA GOES X-ray monitor at 16:52 UT (12:52 EDT). This flash of electromagnetic radiation temporarily altered the upper atmosphere changing its ability to
Gorgeous aurora captured by Martin McKenna! Last night’s geomagnetic storm (April 24, 2012) put on quite a show and this was not even a large event. This is near the childhood homes of some of our esteemed Irish solar physics colleagues!
At 17:40 UT, the Sun produced a C2 solar flare with a radio burst and a SCORE-C CME. NASA Goddard Space Weather Center predicts it will reach Earth 4/27/2012 at 5:49 UT with only minor impact. Currently, there is a
Nature never ceases to surprise and amaze. Just when it looked like the geomagnetic storm from yesterdays CME impacts had fizzled out, Earth’s magnetosphere continues its upset state. Even before the Kp index (a measure of the
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
Saturday, October 22, 2011, started like most any other day, lots of activity of varying size and shape was occurring on the Sun. Most people looking at the Sun that day remember the spectacular lightbulb shaped CME that occurred
A spectacular filament eruption from June 7, 2011 captured by the STEREO Ahead spacecraft with EUVI 304, Cor1 and Cor2. Happy Birthday STEREO!! October 26 ,2011 is the 5th anniversary of the launch of the STEREO mission and
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