REUTERS/Danish Siddiqui
The quake, which struck near the base camp for Everest, was measured at a shallow depth of about 10 km.
"This is a really big one," said Prakash Shilpakar, the owner of a handicrafts shop in Kathmandu who was trying to call his parents in the town of Bhaktapur, devastated in the April 25 quake.
Shockwaves were felt across northern India and as far away as the capital New Delhi, where buildings swayed for more than a minute and people scurried into the streets.
People in Kathmandu rushed outdoors, Reuters reporters said. There were no immediate reports of damage to buildings. Shopkeepers closed their shops.
A 7.8-magnitude earthquake struck on April 25, killing at least 8,046 people and injuring more than 17,800.
Here's a map of the area where the quake hit:
USGS
People in Nepal were evacuating buildings after the quake hit:
USGS says it was a 7.4. I stood under a hallway door between two pillars and counted at least 26 seconds. #NepalEarthquake
- Anup Kaphle (@AnupKaphle) May 12, 2015
Hundreds of people running of out of Kathmandu airport. Scary shaking from aftershock #NepalQuake pic.twitter.com/XiIdB0BCCS
- Jack Board (@JackBoard) May 12, 2015
Earthquake felt like it lasted 5-10 seconds. Brought down quite a few roof tiles at airport. But afraid for damaged buildings in city
- Jack Board (@JackBoard) May 12, 2015
People still standing out on tarmac at KTM airport, a lot of them on the phone #NepalQuake pic.twitter.com/mPHchGiXVI
- Jack Board (@JackBoard) May 12, 2015
Thousands of people from all offices in our building evacuated - waited outside anxiously pic.twitter.com/sSenwAMR5c
- GeetaPandeyBBC (@geetapandeyBBC) May 12, 2015
(Reuters editing by Nick Macfie)