See screenshot where the river Volga on the basemap is shifted relative to the image.
Earth Engine link: https://code.earthengine.google.com/bd0 ... bf3562d41b
Do you have the granule ID(s) of the tiles involved? Did you get the data from the Earthengine or from the LPDAAC: https://e4ftl01.cr.usgs.gov/MOLT/MOD09G ... 010.07.01/
Can you give me the Lat/Long of the area of the Volga River the picture represents? I would like to look at several MOD09GQ tiles for that area to see if they differ from one another. Did you notice that all MODIS tiles from that H/V were offset or just that one. If they are all offset with the earthengine image I would suspect the projection and datum are different then it really isn't an issue. Do you know the projection and datum of the Earthengine image, if it is different from the MODIS Sinusoidal, a shift would be somewhat normal?