- Equinox — Mon, Mar 20, 2023 21:24 UTC • 5:24 PM EDT
Corona
June 20, 2021
What a great way to celebrate the Sun's importance in our lives—a stamp series from the United States Postal Service. #SunScienceStamps #NASASunScience
February 8, 2021
February 9, 2021 marks the one year anniversary of the launch of the ESA/NASA Solar Orbiter Mission. It was launched from Kennedy Space Center at 11:03 pm ET on February 9, 2020. This mission is a single spacecraft designed with […]
October 28, 2018
On this day in 2003 (October 28), the Sun unleashed one of the largest and most geoeffective solar storms of the modern age (and consequently, one of the most studied).
September 12, 2014
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,” […]
September 10, 2014
AR12158 produced an X1.6 flare along with a coronal mass ejection. The flare peaked in X-rays at 17:45 UT. 18:20 UT (9/11/2014) – This movie is a difference movie created by Dr. Nariaki Nitta (@halocme) from the Lockheed Martin Solar and […]
August 4, 2014
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 […]
July 8, 2014
01:22 UT – AR12113 produced an M1.2 flare that peaked in GOES X-ray at 00:26 UT Type II radio emission was detected at 00:29 UT. This emission is associated with a solar eruption and typically indicate a coronal mass ejection […]
June 12, 2014
NOAA active region AR12087 began making its activity apparent in SDO well before it became visible on the Earth facing solar disk. Solar flares from the region became visible in the first week of June. On June 10, the region […]
February 20, 2014
Geomagnetic storms continue while an eruption on the west limb of the sun brings a flare, protons and possibly another CME our way. Solar Eruption The sun erupted with an M3 X-ray flare (NOAA Scale R1-Minor radio blackout) peaked in […]
February 19, 2014
A CME from February 16, 2014 has impacted Earth. The CME’s magnetic structure was such that it stirred things up in the magnetosphere. A significant interplanetary shock detected by ACE at L1 at 3:10 UT, February 19, 2014. The […]
January 31, 2014
CME may impact Earth on Feb. 2, 2014 according to NASA SWRC research models. At 16:11 UT Jan. 30, 2014, an M6.6 flare from AR11967 peaked in the GOES X-ray monitor. This was about 15 minutes after the completion of an […]
October 30, 2013
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 […]
October 25, 2013
The newest active region on the sun has given us an X-flare and a CME! 15:10 UT (10/25/2013) X again! AR11882 kicked it up again with an X2.1 peaking at 15:03 UT. A multi-million degree snapshot with SDO/AIA 94 angstrom. […]
May 29, 2013
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 […]
May 22, 2013
21:21 UT (5/23/2013) – Proton levels the eruption are still at the S2 NOAA alert level, down from S3. The particles are very apparent in SOHO/LASCO C2, showing up as “snow” on the images. 1:17 UT (5/23/2013) – Currently, a S2 […]
May 17, 2013
Wiggly Jiggly Loops by 4 flares from an evolving sunspot AR11748 showed us some exciting yet basically benign activity. A little image processing helps us really see certain aspects of the activity. Keep an eye out for wiggling loops set […]
May 13, 2013
A new active region peaking around the edge of the sun released an X-class solar flare At 2:17 UT or 10:17 pm EDT, an active region that has not yet rotated into view produced an X1.7 solar flare on May […]
November 12, 2012
A total eclipse of the Sun will be visible on November 13/14, 2012 in a narrow path across the southern hemisphere. The Moon’s umbral shadow starts in northern Australia following a path across the South Pacific Ocean without crossing […]
November 7, 2012
An M1.7 flare peaked at 02:23 UT, November 8, 2012. This is not really a big flare but everybody’s attention picks up when the activity level reached M-class (mine included). I don’t yet know where the event came […]
July 12, 2012
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 […]
May 6, 2012
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 […]
April 23, 2012
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 […]
March 14, 2012
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 […]
March 14, 2012
Sungrazing comet seen for the first time with the SOHO/SWAN instrument. It is aptly named Comet SWAN. Ukrainian Amateur astronomer, citizen scientist, and SOHO Comet Hunter Vladimir Bezugly reported a bright blob on images taken by the SWAN instrument on […]
March 14, 2012
Sunspot group or active region AR11429 has almost rotated out of view but it still had enough energy to release an M7.9 X-ray solar flare, a fast coronal mass ejection (CME) and a solar energetic particle event (SEP). A […]
March 11, 2012
CMEs are on their way to us! Estimated impact is March 11, 2012 around 2-3 PM EDT. High latitude aurora watchers keep lookout the night of March 11, 2012. On March 10, 2012, the sun produced 1 C-class […]
March 9, 2012
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 […]
March 7, 2012
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 […]
March 6, 2012
Sunspot group, AR11429, started off its journey across the Earth facing side of the Sun with several bangs. First it produced an M flare on March 2 at 17:29 UT (with a CME) then came another M flare (with a […]
March 5, 2012
Sunspot group AR11429! Here is a look at AR11429 from Friday to today showing the 2 M-class and 1 X-class flare blasting away from the Sun. In addition to those events and their associated CMEs there is a lot of […]
February 6, 2012
Ten years ago yesterday (5 February 2002) saw the launch of the Reuven Ramaty High-Energy Solar Spectroscopic Imager, or RHESSI (pronounced reh-see). RHESSI was designed to study particle acceleration and energy transport during solar flares by observing the highest energy […]
December 15, 2011
UPDATE: Lovejoy survived despite most predictions to the contrary! Check out the videos below. A sungrazing comet called Lovejoy is near what will surely be its end. Sungrazers melted by the Sun is not really new. In fact, SOHO has become […]
November 3, 2011
Solar Activity Solar activity was at low to moderate levels, with occurrences of several C-class flares and three M class flares (see the list below). Quite a few slow to moderate CMEs were detected emanating from different regions of the […]
November 3, 2011
Sunspot group AR11339 (AR stands for Active Region) has just rotated onto the Earth facing disk of the Sun. Before coming completely into view the region had produced two M flares in 24 hours (an M4.3 flare […]
October 26, 2011
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 […]
September 6, 2011
At 01:50 UT, sunspot group, AR11283, produced an M5 solar flare and CME (coronal mass ejection) from near the center of the solar disk. The CME appears to be moving at an angle away from a path straight towards […]
August 28, 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 […]
July 4, 2011
A few weeks ago 3 groups of solar scientists released a joint press release at the 2011 meeting of Solar Physics Division (SPD) of the American Astronomical Society. Each group presented a unique set of solar observations, […]
June 7, 2011
A solar flare, coronal wave, filament eruption, coronal rain & a coronal mass ejection (CME)!
May 20, 2011
An extensive series of arcs, observed in profile, can be seen making a long distance connection between two active regions (Mar. 15-17, 2011). As SDO observed in extreme ultraviolet light, a series of magnetic field lines generated a well-defined pathway […]
May 8, 2011
With the approaching final launch (scheduled July 8, 2011) of the Space Shuttle Atlantis and the end to the 30 plus year Space Shuttle program, it is a good time to take a brief fond farewell look at the Shuttle […]
April 1, 2011
SDO Pick of the Week for April 1, 2011 A side-by-side comparison of the Sun from precisely two years ago (left, from SOHO) to the present (right, from Solar Dynamics Observatory) dramatically illustrates just how active the Sun has […]
January 16, 2011
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 […]
January 10, 2011
We have reached the milestone of 1000 Fans on our FaceBook page! As promised, we have been preparing a small treat for all of you as a sign of appreciation for making the TheSunToday page such a great success in […]
December 21, 2010
SOHO’s LASCO C2 and C3 coronagraphs caught the action as three, separate coronal mass ejections (CMEs) blasted out in succession from the Sun (Dec. 12, 2010). These were each distinct and unconnected events. The first CME event (directly on the […]
December 12, 2010
A very long solar filament that had been snaking around the Sun erupted (Dec. 6, 2010) with a flourish. STEREO (Behind) caught the action in dramatic detail in extreme ultraviolet light of Helium. It had been almost a million km […]
December 2, 2010
The Solar and Heliospheric Observatory or SOHO is by many accounts the granddaddy of modern solar astronomy. SOHO is not the first space based solar observatory but it has truly ushered in a golden age for solar physics. The mission […]
November 8, 2010
As expected SDO experienced another lunar transit on November 6, 2010. This time the moon crossed the southern hemisphere moving from the south pole towards the northeast (left side) edge of the sun. The transit took about 30 minutes and […]
October 18, 2010
A giant filament on the sun produced a small eruption and flare.
October 7, 2010
A filament erupted in the NE area of the sun. The eruption was observed by SDO and the associated Halo CME was seen by SOHO's C2 and C3 coronagraphs. SDO is currently in eclipse season so during this event the earth moved between SDO and the sun, moving across the sun for a few minutes.