The husband of a woman missing from her Sydney home for more than a year has appealed to her to make contact after a string of reported sightings.

An inquest into the disappearance of Elaine Morgan, of Turramurra in Sydney's north, was put on hold on Monday after reports of a woman matching her description was spotted at an Adelaide beach.

Ms Morgan, 49 when she disappeared, has not been since dropping her daughter at a dance class in St Ives on April 17 last year.

Her car, a white Subaru Forester, was later found at a car park at North Head, but a search of the area failed to find her.

Her husband of almost 30 years, Dylan Morgan, found a note at the family home, which read: "Dylan I love you, you are a good man. God be with you, love Elaine."

Mr Morgan and their daughters Sophie, 12, and Lois, 24, say they are desperate for any news about Elaine's whereabouts and have appealed for her to make contact.

"Although Elaine has been missing for 15 months, we have not given up hope," Mr Morgan said in a statement issued on Wednesday.

"I appeal to Elaine to contact us either directly or through any intermediary to let us know how you are because we are desperate for news, because we love you and miss you dreadfully."

Before the inquest was adjourned, Mr Morgan told the Glebe Coroner's Court his wife had once before left without telling anyone, but had returned 24 hours later.

He said he believed she might not have contacted him if she were still alive because she believed too much time had passed.

Since her disappearance there have been unconfirmed reports of sightings of Ms Morgan at various locations in both NSW and South Australia.

Deputy State Coroner Hugh Dillon has asked NSW and South Australian police to liaise in a bid to find the missing woman.

Mr Morgan is asking any members of the public who have information about his wife's location to contact Crime Stoppers on 1800 333 000 or the Missing Persons freecall number on 1800 000 634.