Syismal or Seismal: How To spell?

The word Syismal is misspelled against Seismal, an adjective meaning "pertaining to an earthquake; caused by an earthquake."

Word contains consecutive vowels 'EI' in between alphabets s & smal is misspelled as 'YI'
Wrong Spelling:  s-yi-smal 
Correct Spelling:  s-ei-smal 
Find more wrongly spelled words of Seismal to spell it well.