Mount Wilson Observatory
The 150-foot Solar Tower at the Mount Wilson Observatory makes their daily current sunspot drawing available online.
Global Oscillation Network Group (GONG)
The Global Oscillation Network Group (GONG) studies changes in the Sun’s internal structure by means of helioseismology.
GONG posts up-to-the-minute H-alpha images of the Sun’s chromosphere. These images are a close representation of what one would see in the eyepiece of a telescope equipped with an H-alpha filter. For more information, see the GONG H-alpha information page and NSO information page.
High-quality images dating back to 2010 are available via HTTP and FTP.
Magnetogram images and Potential-field Source-surface (PFSS) models (see this information page for more) are also available.
Solar Dynamics Observatory (SDO)
The following is a selection of SDO images pulled from the SDO Data page. They represent views of the Sun’s photosphere, chromosphere, transition region, and corona. Refer to this article on how SDO sees the Sun and these descriptions of SDO imaging in various wavelengths for more information. These images are provided as a courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
Helioseismic and Magnetic Imager (HMI)
Stanford University HMI Home Page
Archive of HMI images since May 1, 2010
HMI Intensitygram / Continuum
Flattened view of visible light that is useful for seeing sunspots:
Magnetic field polarity of the photosphere (white is north/outward polarity and black is south/inward polarity):
Atmospheric Imaging Assembly (AIA)
AIA 1700 Å
Photosphere and chromosphere (48-hour video):
AIA 304 Å
Chromosphere and transition region (48-hour video):
AIA 193 Å
Corona and solar flare plasma (48-hour video):
Solar Terrestrial Relations Observatory (STEREO)
The following is a selection of STEREO images pulled from the STEREO latest images page. They indicate solar features that are about to rotate into view here on Earth. For comparison, images from SDO AIA indicate Earth-facing views.
STEREO 195 Å
SDO AIA 193 Å
STEREO 304 Å
SDO AIA 304 Å
Solar and Heliospheric Observatory (SOHO)
The following SOHO images are pulled from the SOHO Images page. See this article for descriptions of the types of images that SOHO captures.
Large Angle Spectrometric Coronagraph (LASCO) Images
Up to 8.4 million kilometers (5.25 million miles) in width:
Up to 45 million kilometers (about 30 million miles) in width: