coseismal vs coseismic

coseismal and coseismic both are adjectives.

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

As adjectives, coseismal and coseismic are synonyms defined as:

coseismal and coseismic: being where earthquake waves arrive simultaneously

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