Sysmometric or Seismometric: How To spell?

The word Sysmometric is misspelled against Seismometric, an adjective meaning "pertaining to seismometry, seismometer; as, seismometric instruments; seismometric measurements."

Word contains consecutive vowels 'EI' in between alphabets s & smometric is misspelled as 'Y'
Wrong Spelling:  s-y-smometric 
Correct Spelling:  s-ei-smometric 
Find more incorrect spellings of Seismometric to spell right way.