SDO is the Solar Dynamics Observatory and HMI is the
Helioseismic and Magnetic Imager aboard the spacecraft
which is in geosync orbit. A large (~ 1.8 MB) HMI image of
the sun (4096x4096) has been colorized and annotated here
with all sunspots identified:
Please use the above link to download the full image and
zoom in to enlarge sun spots. The Thumbnail below is a
~ 75 KB version of the image.