A woman who let loose with a torrent of racial abuse against an innocent Asian woman on a Sydney train has been charged with using offensive language.

The 55-year-old woman, Sue Wilkins, mocked the language and facial features of the other passenger on a Sydney to Newcastle train on Wednesday.

• VIDEO: Racial abuser says she’s ‘deeply ashamed’

After she caused a scene inside the carriage, police first spoke to Ms Wilkins on Wednesday when she got off at Strathfield in Sydney’s west.

She was later arrested at Wyong station on the Central Coast, and was issued a summons for offensive language.

After video of the attack went viral, Wilkins told the Nine Network she just had a “brain snap” and couldn’t stop.

“I was just getting all this anger out at anybody that would be near me, anybody at all,” Ms Wilkins said on Thursday.

“No one deserves to be spoken to like that…”

If found guilty of offensive behaviour, she faces a $500 fine.