A 6.7-magnitude aftershock struck earthquake-devastated Nepal on Sunday, the USGS said, with climbers reporting the tremor triggered more avalanches on Mount Everest.

The latest quake struck northeast of Kathmandu near the border with China at a depth of 10 kilometres (6.2 miles), the US Geological Survey said.

Climber Jim Davidson said he felt the aftershock at Camp One on Everest.

"Just had our biggest aftershock yet here at C1 on Everest. Smaller than original quake but glacier shook & avalanches," he tweeted.