SAN FRANCISCO, July 25 (Xinhua) -- Facebook disappointed Wall Street Wednesday with its earnings of 13.23 billion U.S. dollars in the second quarter falling short of the expected 13.36 billion, although the social media giant said its revenue rose 42 percent over the same period of last year.

In a report of financial results which ended June 30, 2018, Facebook earned about 13.04 billion dollars from advertising, up 42 percent from the same period of 2017, when the earnings were 9.16 billion dollars.

Mobile advertising revenue represented approximately 91 percent of the social giant's advertising profits, up 87 percent over the corresponding period of 2017.

Facebook said the number of its daily active users was 1.47 billion on average for June 2018, increasing 11 percent year-over-year, a little bit less than the expected figure of 1.49 billion. Its monthly active users also grew 11 percent year-over-year to hit 2.23 billion by the end of June.

The net income in Facebook's Q2 financial reports was 5.106 billion dollars, up 31 percent year-over-year, with its earnings per share standing at 1.74 dollars,

Facebook reported capital expenditures for the second quarter of 2018 at 3.46 billion dollars.

The world's largest social network suffered a major setback when it was involved in a data breach scandal in March after Cambridge Analytica, a British voter-profiling company, was accused of illegally harvesting the data of more than 87 million Facebook users to target political advertising.

Since then, its CEO Mark Zuckerberg has testified separately before U.S. Congress and the European Union about his company's protection of user data.

In order to boost its profile, Facebook has also introduced several changes to its advertising policy that focused on removing misinformation that incites violence or hatred.