Using “rivetted” (double t) is correct? [duplicate]

Solution 1:

The Oxford English Dictionary lists both: riveted, rivetted. But it seems in both US and UK, riveted is currently the more common.

Ngram:

"direct (one’s eyes or attention) intently" matches the quotation given.

Solution 2:

It should be riveted to be correct.

The rule for doubling a trailing T is when it's stressed. For example:

• targeted - pronounced as TAR-ge-tid, same for targeting (marketed, marketing)
• regretted - pronounced as ri-GRE-tid, same for regretting (admitted, admitting and for all single-syllable words like chat, plot, put, sit etc.)

Given rivet is pronounced as RI-vit (Wiktionary), riveted should not have double T. I would've spoken ri-VE-tid had I seen rivetted.

P.S. The same rule applies to a wide range of words ending in vowel + consonant, like cap, repel, rob, blur, etc.