New York: Buoyed by surging user base in the emerging markets of India and Brazil, social networking giant Facebook has said its monthly active users (MAUs) rose by 21% to 1.15 billion as of 30 June 2013.

The US-based firm had reported a user base of 955 million in the same period a year ago.

“Users in India and Brazil represented key sources of growth in the second quarter of 2013 relative to the prior year," Facebook said in a filing to the US Securities and Exchange Commission (SEC).

MAUs are a measure of the size of its global active user community.

The firm’s global daily active users (DAUs) rose by 27% to 699 million on average during June 2013 from 552 million during June 2012, again helped by growth in India, Brazil and other markets.

“We experienced growth in DAUs across major markets including Brazil, India, and the US," it said.

DAU is a daily registered Facebook user who logged in and visited Facebook through the website or a mobile device or took an action to share content or activity with his or her Facebook friends or connections via a third party website that is integrated with Facebook, on a given day.

The firm, however, did not give individual MAU figures for India and Brazil for the period ended 30 June.

As of 31 March 2013, Facebook had 73 million MAUs in Brazil, an increase of 62% compared to the same period in 2012. The user base in India rose by 50% to 78 million as of 31 March 2013 compared to the same period in 2012.

Powered by surging mobile advertising revenue, Facebook posted a net income of $333 million for the April-June quarter against a loss of $157 million in year-ago period.

Revenue totalled $1.81 billion in the second quarter, an increase of 53%, compared with $1.18 billion in the second quarter of 2012. Its revenue from advertising grew by 61% to $1.60 billion in the quarter over the year-ago period.

Worldwide mobile MAUs rose by 51% to 819 million as of 30 June 2013 from 543 million as of 30 June 2012.

“In all regions, an increasing number of our MAUs are accessing Facebook through mobile devices, with users in India, Brazil, and Indonesia representing key sources of mobile growth over the second quarter of 2013 as compared to the first quarter of 2013," it added.

Mobile MAUs is a user who accessed Facebook via a mobile app or via mobile-optimised versions of the website such as, whether on a mobile phone or tablet such as the iPad, during the period of measurement.