Eartquake Interferogram interpretation

I produced an interferogram from the Sentinel 1-A descending images by following the steps described in the link below.

https://dges.carleton.ca/CUOSGwiki/index.php/Creating_Interferogram_for_Mapping_Earthquake_Deformation_by_using_Sentinel-1_Data_in_SNAP

The result image is as follows. The two images used in the interferogram constitute 2 Sentinel images before and after the earthquake.

How can I interpret this interferogram.

Thank you.

Have you seen these helpful guidelines?