FACTBOX: 18 countries affected by Russia-Ukraine gas row

(Reuters) - Russian gas flows via Ukraine were halted for a third straight day on Friday, hitting 18 countries ranging from large European Union members including Germany to small ex-Soviet Moldova.

AUSTRIA - About 60 percent of annual demand is met by Russian gas*

Gas flows stopped on January 7.

No rationing of supply to Austrian firms before next Monday.

Oil and gas group OMV was drawing on reserves, domestic production and other imports to guarantee supply.

GERMANY - Russian gas meets about 42 percent of annual demand*

German energy groups E.ON AG and Wingas are relying on gas stores and a transit route via Poland. Gas shipments to Europe via Ukraine have been massively reduced since early on Tuesday, and no Russian gas has arrived into Germany via the Czech Waidhaus border point for a third day.

Energy firms warned of gas shortages if the dispute lasted much longer and sub-zero temperatures endured.

TURKEY -- Russia meets about 67 percent of annual gas demand*

Production at three Turkish power stations stopped on Thursday. Russian gas supplies from a western pipeline passing through Ukraine were cut on Tuesday. The country has raised supplies of Russian gas delivered via a pipeline under the Black Sea. Gazprom's Blue Stream pipeline to Turkey is working at full capacity of 45 million cubic metres (mcm).

Iran raised the amount of its daily supply volumes to Turkey to 18 million cubic metres from 12 million, following the partial cut off of Russian gas, an Iranian diplomatic source said on Friday.

GREECE -- Russia meets about 82 percent of annual gas demand*

All Russian gas supplies via Ukraine to Greece were halted on Tuesday. Turkey's gas exports to Greece were below the contract level with low pressure on the pipeline.

Greece, a latecomer to creating infrastructure to supply gas to households, is better placed to ride out the Russia-Ukraine gas crisis than some of its neighbors as the country continues to rely on oil for heating and power production.

According to the Greek gas company Depa, natural gas accounts for about 20 percent of Greece's energy needs, with about 9 million cubic metres per day needed to cover domestic demand. About 5-6 million cubic metres (mcm) come from Russia, via Ukraine and then Moldova, Romania and Bulgaria.

ITALY -- About 28 percent of annual demand for gas is met by