"discernible by" is a correct and usable phrase in written English.
It typically suggests that something is capable of being identified, detected, or distinguished. For example, you could say, "The difference in quality between the two brands of wine was discernible by even the most inexperienced taster."
Whether a peace settlement and its consequences will be discernible by then is another matter.
This motion, in fact, would not be discernible by an observer in a closed box.
Discernible by their sloping glass fronts and roughly finished adobe walls, his semi-underground dwellings resemble something from Mad Max.
New Indo-Aryan shows evidence of early dialect distribution; this is discernible by considering sound changes proper to each group.
The central and calcarine sulci are discernible by the fifth fetal month, and all major gyri and sulci are normally present by the seventh month.
On the road in from Denver airport, several of the state's estimated 800-900 legrowerswers have taken advantage of cheap warehouse space to open sophisticated indoor facilities, whose odour is clearly discernible by passing motorists.
But it's this resistance to being lumped in with the others which makes it stand out; its significance – like the lapel badge sported by members of the Society of the Crossed Keys – only discernible by the specially refined.
The masks also helped to make the portrayal of female characters by male actors more plausible, as well as to make the facial features clearly discernible by the large audience.
And the make and model of your vehicle is easily discernible by anyone nearby.
The rest of the composite is the polymeric binder that is discernible by its fiber appearance.
However, their method contains a flaw, not discernible by reading their article, that invalidates this conclusion.
