Many more are feared trapped under rubble after hundreds of buildings collapsed.
Thousands of people have been forced to take refuge in temporary shelters and mosques.
Some have been left homeless after their houses were destroyed, others have fled their homes amid fears of aftershocks and a possible tsunami.
Rescue workers used diggers to remove rubble in their search efforts overnight on Wednesday.
Others used their bare hands and shovels to find people.
A few survivors were pulled out alive on Wednesday.
More than 200 buildings were either seriously damaged or toppled in the earthquake.
The Pidie Jaya region, on the north Aceh coast, was the hardest hit.
The tremor hit just offshore early on Wednesday morning.
Many of the homes in the area have corrugated tin roofs which collapsed.
Hundreds have also been rushed to the sole functioning hospital, which has been overwhelmed by patients.
Banda Aceh, the provincial capital, was one of the worst hit areas by the 2004 tsunami, caused by a massive earthquake.

Remortgaging loans approved in July hit the highest level for nearly seven years, the Bank of England data show.
Mortgage approvals for house purchases also rose to a 17-month high.
Both remain far below the peak of housing market activity, but signal an assumption of imminent rate rises despite market turmoil in recent days.
The economic situation in China created a shock across world markets and some analysts suggested this could delay a rise in the Bank rate in the UK.
The governor of the Bank of England was more circumspect in a recent speech and has hinted that a rate rise could be seen next year.
Homeowners have been increasingly signing up to mortgage deals, especially by remortgaging, in anticipation of a rate rise. This has been encouraged by competition between lenders battling over borrowers' custom.
Howard Archer, chief UK economist for IHS Global Insight, said the Bank's latest figures were "compelling evidence" that housing market activity was firming up.
"It is possible that July's performance may have been lifted by some house buyers looking to move quickly to try and lock in a low mortgage interest rate before they start rising," he added.

The city's Labour council unveiled the proposal as part of the city's new development plan.
The report said the new homes are needed to cope with a predicted increase in the city's population of 40,000 people by 2030.
A Lib Dem councillor described the figures as "unrealistic".
The document identifies 62 sites across the city that could be used for housing, including Holme Hill which could see 5,580 properties built and Clifton Gate which the report said has potential for 4,020 new homes.
Some of the proposed new homes would be built on greenbelt land.
Councillor James Alexander, Labour leader of City of York Council, said the biggest challenge facing the city was the need for affordable housing.
He said: "We've taken the tough decision to allocate 1.8% of draft greenbelt land for development in order to meet the needs of our rapidly growing city and deliver key developments such as York Central, and to deliver jobs, homes and protect York's unique built environment for future generations."
Councillor Ann Reid, Liberal Democrat spokesperson for planning and sustainability, claimed that the city's population had only grown at 1% per year over the last decade, a figure which only required 400 new homes each year.
She said the target of 1,090 new homes a year had been "plucked from nowhere".
Ms Reid said: "What we do know is that growth on this scale would radically alter the character of York and put a strain on existing infrastructure."
The plan is to be out to public consultation.

The neighbours entered the burning property in Milford Drive, on Sunday afternoon in an attempt to rescue two cats, police said. The occupants were not home at the time.
The women had inhaled smoke and were taken to hospital with breathing difficulties. The cats were unharmed.
Fire destroyed the front door and caused heavy smoke damage to the house.
Dorset Police said it believed the fire had been started deliberately through the cat flap in the front door of the property at about 15:00 BST.
Officers are appealing for witnesses or anyone with CCTV to get in touch.
Det Con Luke Davis said: "I am appealing to anyone who saw suspicious activity near to the property during that afternoon, particularly anyone seen in the garden or the front drive of the property just before 3pm, to please contact me.
"If you have any information about the cause or motive of the fire, please contact Dorset Police or call Crimestoppers anonymously."
A 6.5-magnitude earthquake struck Aceh province in Indonesia on Wednesday, killing at least 97 people.
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Continued expectations of an interest rate rise are prompting more homeowners to lock into a new mortgage deal, figures suggest.
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Plans to build more than 1,000 homes a year in York over the next 15 years have been criticised  by opposition councillors.
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Two women have been rescued following a suspected arson attack on a house in Bournemouth.