coseismic vs coseismal

coseismic and coseismal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
coseismic	No	Yes	No	No
coseismal	No	Yes	No	No

As adjectives, coseismic and coseismal are synonyms defined as:

coseismic and coseismal: being where earthquake waves arrive simultaneously

coseismic (adjective)	coseismal (adjective)
being where earthquake waves arrive simultaneously	being where earthquake waves arrive simultaneously