MAPUTO, Dec. 22 (Xinhua) -- A 5.5-magnitude earthquake struck central Mozambique near its border with Zimbabwe on Saturday, according to a website report of the Global Disaster Alert and Coordination System.

The report said this earthquake, which hit at 0537 GMT, would mainly affect the province of Manica in Mozambique and Manicaland in Zimbabwe.

It was expected to have a medium humanitarian impact based on the magnitude and the affected population, said the report.

Meanwhile, the U.S. Geological Survey put it as a very shallow earthquake with a depth of 7.6 kilometers (4.7 miles), saying that up to 21 million people could have felt the shaking.

There was no report on damage or injuries up to the moment.