The epicentre of the quake was 34 kilometres (21 miles) northeast of Jalalabad city in Nangarhar province, according to the USGS.
"These aftershocks are constant, but they have not caused any casualties yet," Ehsanullah Ehsan, the disaster management spokesman in Kunar, told AFP.
The number of victims from Sunday's earthquake has mounted steadily, with 1,411 people dead and 3,124 injured in Kunar alone, chief Taliban government spokesman Zabihullah Mujahid said on Tuesday, making it one of the deadliest to hit the country in decades.
Another dozen people were killed and hundreds injured in neighbouring Nangarhar province.
Afghanistan is one of the poorest countries in the world, with dwindling aid since the Taliban seized power in 2021, undermining its ability to respond to disasters.
The devastation could affect "hundreds of thousands", said United Nations humanitarian coordinator for Afghanistan Indrika Ratwatte.
Rescuers searched through the night and all day for survivors in the rubble of homes flattened in Kunar, where more than 5,400 houses
The European Union said it was sending 130 tonnes of emergency supplies and providing one million euros ($1.2 million) to help victims of the deadly quake.
The bloc has become one of the key aid donors to Afghanistan after the United States -- previously the country's largest aid provider -- cut all but a slice of its assistance after President Donald Trump took office in January.
The aid cuts risk impeding the response to the earthquake, sector
"The scale of need far exceeds current resources," the International Federation of Red Cross and Red Crescent Societies (IFRC) said, noting that funding cuts had hit humanitarian air services, "limiting access to remote communities".
IFRC said it had launched an emergency appeal for 25 million Swiss francs ($31 million) to help with the earthquake response and recovery, as various countries pledged to send
As Taliban military helicopters flew in food and continued to transport victims, residents buried their dead, including children, wrapping them in white shrouds and praying over their bodies before laying them to rest.
'Find their families'
Sunday's earthquake epicentre was about 27 kilometres (17 miles) from Jalalabad, according to the USGS, and just eight kilometres below the Earth's surface.
Such relatively shallow quakes can cause more damage, especially as the majority of Afghans live in mud-brick
Many of those living in the quake-hit villages were among the more than four million Afghans forced back to the country from Iran and Pakistan in recent years, many coming through the Torkham border crossing in Nangarhar province.
Rahmatullah Khaksar, who heads the emergency ward at a hospital in Jalalabad, Nangarhar's provincial capital, said they had received 600 injured since Sunday night.
"Most of the patients were trauma patients. They were hit on the head, back, abdomen and
Afghanistan is frequently hit by earthquakes, especially in the Hindu Kush mountain range near the junction of the Eurasia and India tectonic plates.
Western Herat province was devastated in October 2023 by a 6.3-magnitude earthquake, which killed more than 1,500 people and damaged or destroyed more than 63,000 homes.
A 5.9-magnitude quake struck the eastern province of