Category Archives: SDO

Big Sunspot Coming


Here is an image from the Solar Dynamics Observatory or SDO and we can see a large sunspot on the left side. Actually this sunspot is many-many times the size of Earth and is rotating left to right so in about a week will be directly facing us and that gives us a possibility of increased solar activity including a CME.

I’m not saying anything much will happen, just that the possibility exists – you never know there could be a great aurora coming.

Here are a couple of sites to watch:
Space Weather Prediction Center

Magnetic Map of the Sun


This illustration lays a depiction of the sun’s magnetic fields over an image captured by NASA’s Solar Dynamics Observatory on March 12, 2016. The complex overlay of lines can teach scientists about the ways the sun’s magnetism changes in response to the constant movement on and inside the sun. Note how the magnetic fields are densest near the bright spots visible on the sun – which are magnetically strong active regions – and many of the field lines link one active region to another.

This magnetic map was created using the PFSS – Potential Field Source Surface – model, a model of the magnetic field in the sun’s atmosphere based on magnetic measurements of the solar surface. The underlying image was taken in extreme ultraviolet wavelengths of 171 angstroms. This type of light is invisible to our eyes, but is colorized here in gold.

Credits: NASA/SDO/AIA/LMSAL/Steele Hill and Sarah Frazier NASA’s Goddard Space Flight Center, Greenbelt, Md.

The SDO Eclipse Season Begins


The SDO description:
Due to the geometry of Solar Dynamic Observatory’s orbit, there are periods when the spacecraft’s view of the Sun is blocked by the Earth and sometimes the Moon. Starting this earlier this week (video taken on Feb. 22, 2016) and for the next few weeks, the Earth will continue to get in the way once a day around 7:00 UT. This eclipse season occurs twice a year, near the equinoxes. The video covers about 15 minutes as the Sun is becoming unblocked again. The Sun was blocked for close to an hour. Such is life in space 22000 miles above Earth.

Credit: Solar Dynamics Observatory, NASA.

Solar Filament


The Solar Dynamics Laboratory captured a filament breaking away from the Sun.  The image shows the dark filament as it is breaking away.  The video’s show the sequence of events, here is a link to the smaller of the two (the larger is at the link below).

From the SDO site:

A dark and almost circular filament broke away from the Sun in a gauzy, feathery swirl, followed by a second filament eruption that was below it (Nov. 15-16, 2015). Filaments are dark strands of plasma tethered above the Sun’s surface by magnetic forces that over time often become disrupted. The video clip taken in a wavelength of extreme ultraviolet light, covers nine hours of activity. Solar astronomers had been watching and chatting about this almost circular filament for several days. The first eruption featured a sizable  and mostly dark stream of plasma that twisted away into space.

Credit: Solar Dynamics Observatory, NASA.

Swirling Plasma

From the SDO site:

A small, but complex mass of plasma gyrated and spun about over the course of 40 hours above the surface of the Sun (Sept. 1-3, 2015). It was stretched and pulled back and forth by powerful magnetic forces but not ripped apart in this sequence. The temperature of the ionized iron particles observed in this extreme ultraviolet wavelength of light was about 2.8 million degrees C. (or 5 million degrees F.)

Credit: Solar Dynamics Observatory, NASA.


Solar Flare


Yesterday morning at 07:40 UT / 03:40 ET the Solar Dynamics Observatory took this image of a mid-level solar flare.

I found about the flare at a little after 08:00 / 04:00. The flare was an M 5.6 so I thought it might give us an aurora especially given the geometry. So I real quick fed the cat and dog and went charging outside looked up and saw a black sky and not a star in sight.

The clouds were there to stay. Maybe next time.

Image: SDO

Solar Arch

A beautiful arch forms on the Sun and is watched by the SDO.

From the SDO webpage:
Magnetically charged particles formed a nicely symmetrical arch at the edge of the Sun as they followed the magnetic field lines of an active region (Aug.4-5, 2015). Before long the arch begins to fade, but a fainter and taller arch appears for a time in the same place. Note that several other bright active regions display similar kinds of loops above them. These images of ionized iron at about one million degrees were taken in a wavelength of extreme ultraviolet light.

There is a 30 hour timelapse video and worth a look if you have a decent connection.

Credit: Solar Dynamics Observatory, NASA.

Coronal Mass Ejection

The Solar Dynamics Observatory gives us this great view of a coronal mass ejection (CME) from the side of the Sun. The image is captured in the 304 Angstrom Wavelength of extreme ultraviolet light on 17 to 18 June 2015.


Had this CME been directed towards Earth there could have been impacts like those we always hear about, namely communication and power disruptions. The news media usually likes to tell us how bad things could be and sometimes we ignore what they say because, well, they always say it. The truth is all of that stuff could happen and be as bad as they like to say OR anywhere along a continuum between just a beautiful aurora and that  doom and gloom scenario.

Being a ham radio operator I can tell you communications disruptions are not really uncommon in such events, they can be kind of fun too. Commercial communication problems would not be fun and we have been on the LUCKY side of things so far.

Anyway, enough rambling; there is a great video of this CME, a four hour period is represented.

Take your pick of videos, they are the same just different formats.  (Links to the SDO site): – mov
CME304_June_sm.mp4 – mp4

Filament 304

A filament on the Sun.  Image: NASA / SDO
A filament on the Sun. Image: NASA / SDO

Filaments are relatively cooler and denser regions in the chromosphere that have been stretched along magnetic field lines. The bright patches could be plages, hot spots in the chromosphere and possibly future sunspots.

Check out the movie on the SDO link below.

From the SDO website:

A dark, solar filament hovered above the Sun’s surface, extending across more than half the Sun (Feb. 7-10, 2015). If that filament were straightened out, it would be more than 533,000 miles long, longer than 67 Earths. These images were taken in a wavelength of extreme ultraviolet wavelength of light of material heated to about 60,000 degrees C. Filaments are cooler clouds of particles tethered above the Sun by powerful magnetic forces. Though this one has been fairly stable for many days, they are liable to break apart at any time. Credit: Solar Dynamics Observatory/NASA.