Nov 8 (Reuters) - Vodafone Qatar , an affiliate of Vodafone Group , reported a narrowing second-quarter loss on Tuesday, according to Reuters calculations.

The operator made a net loss of 63.9 million riyals ($17.6 million) in the three months to Sep. 30, Reuters calculations showed, using financial statements in lieu of a quarterly earnings breakdown.

That compares with a loss of 113.6 million riyals in the prior-year period, and the forecast of a 94 million riyal loss from Arqaam Capital.

The company made a half-year net loss of 163.5 million riyals compared with a 213.5 riyals loss in the year-ago period, according to a bourse statement.

($1 = 3.6412 Qatar riyals)

(Reporting by Alexander Cornwell; Editing by David French) ((Alexander.Cornwell@thomsonreuters.com;))