# Synchronic EUV and coronal hole maps

Here we provide synchronic EUV and coronal hole (CH) maps from 6/10/2010 to 8/18/2014 at 6-hour cadence. See below for detailed instructions on accessing the data.

Display map:

Use the calendar to select the desired day and hour and the closest data to that time will be shown (the time shown is for the STEREO-A image (the data times for the other spacecraft are within $$\pm$$10 minutes).
For all map images and data, an EUV disk image radius of $$R_0=1.01\;R_{\odot}$$ is assumed and used for processing and mapping.