Front Page

Only 1 solar rotation until the August eclipse!

K-Cor image 3 CR before August 21st eclipse

Located at 11,200 feet in Hawaii, the NCAR K-Cor coronagraph records images of the corona. The Sun takes 27.3 days to rotate as seen from Earth. Since the corona usually changes slowly we can imagine what the eclipse will look like using pictures of the corona taken 1, 2, even 3 solar rotations before the eclipse. Stay tuned as we post new images closer to eclipse time!

Image taken 2017-05-31, 3 solar rotations before August eclipse

K-Cor image 2 CR before August 21st eclipse

Located at 11,200 feet in Hawaii, the NCAR K-Cor coronagraph records images of the corona. The Sun takes 27.3 days to rotate as seen from Earth. Since the corona usually changes slowly we can imagine what the eclipse will look like using pictures of the corona taken 1, 2, even 3 solar rotations before the eclipse. Stay tuned as we post new images closer to eclipse time!

Image taken 2017-06-27, 2 solar rotations before August eclipse

K-Cor image 1 CR before August 21st eclipse

Located at 11,200 feet in Hawaii, the NCAR K-Cor coronagraph records images of the corona. The Sun takes 27.3 days to rotate as seen from Earth. Since the corona usually changes slowly we can imagine what the eclipse will look like using pictures of the corona taken 1, 2, even 3 solar rotations before the eclipse. Stay tuned as we post new images closer to eclipse time!

Image taken 2017-07-25, 1 solar rotations before August eclipse

Recent News

Art Richmond
Art Richmond Honored at the 2017 CEDAR Summer Workshop
July 24, 2017

Art Richmond was awarded the 2017 Coupling Energetic Dynamics Atmospheric Research (CEDAR) Distinguished lecture for his fundamental contributions to upper atmosphere and ionosphere science over several decades.

More news in our archive >>

Publication Highlights

Raw S082B image with wavelength scale
On the Fine Structure Splitting of the 3p43d4D5/2 and 3p43d4D7/2 Levels of FE X
July 21, 2017

We study UV spectra obtained with the SO82-B slit spectrograph on board SKYLAB to estimate the fine structure splitting of the Cl-like 3p43d4D5/2 and 3p43d4D7/2 levels of Fe X.

Magnetic data are shown for active region 11890
Are All Flare Ribbons Simply Connected to the Corona?
July 21, 2017

We consider the observational basis for the belief that flare ribbons in the chromosphere result from energy transport from the overlying corona. We study ribbons of modest flares using magnetic as well as intensity data from the Hinode, SDO and IRIS missions.

MHD simulations
MHD Simulations of the Eruption of Coronal Flux Ropes under Coronal Streamers
July 20, 2017

Using three-dimensional magnetohydrodynamic (MHD) simulations, we investigate the eruption of coronal flux ropes underlying coronal streamers and the development of a prominence eruption.

More highlights in our archive >>
Be sure to visit HAO's Research Page

MLSO Latest Images

CoMP Coronal Intensity

The COronal Multi-channel Polarimeter (CoMP) observes the Fe-XIII emission line at 1074.7 nm to measure the coronal magnetic field and obtain plasma density and motion in the low corona from ~1.03 to 1.5 solar radii.

GET CoMP DATA

K-Cor White Light Corona

Designed to study the formation and dynamics of coronal mass ejections and the evolution of the density structure of the low corona, K-Cor records the polarization brightness (pB).

GET K-COR DATA

K-Cor (radially graded filter)

K-Cor image with a normalized radially graded filter (nrgf) to maximize image contrast, especially in the outer field.

These data are ideal for measuring positions of coronal structures such as CMEs and helmet streamers.

People Profile

The National Center for Atmospheric Research is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.