The March 28 magnitude-7.7 quake in Myanmar's central belt killed nearly 3,800 and has left tens of thousands homeless as the summer monsoon season approaches.

The junta -- which snatched power in a 2021 coup, sparking a many-sided civil war -- declared a ceasefire on April 2 and extended it last week as aid groups warned of a long road to recovery.

It expired at midnight on Wednesday (1730 Tuesday GMT) with the junta information team making no announcement of an extension. A junta spokesman could not be reached for comment on Wednesday.

Monitors from the Britain-based Centre for Information Resilience logged 65 air attacks by the military during the proclaimed ceasefire period -- many clustered in regions worst-hit by the quake.

When the military pledged to pause offensives it warned the myriad of anti-coup and ethnic armed groups it is battling that it would strike back if they advance.

During the ceasefire period, opposition armed groups besieged towns on a lucrative eastern trade route to Thailand, according to locals, who said fighting had forced many civilians from their homes.

The quake was the strongest centred on Myanmar's landmass since 1912, according to the United States Geological Survey, with the ground shearing up to six metres (20 feet) in places, according to NASA analysis.

The International Federation of Red Cross and Red Crescent Societies this week predicted it would take the country two years to fully recover from the disaster.