In the currency market, the USA dollar is trading in the lower 112 yen-range on Friday. "We can not conclusively confirm at this time the nature (natural or human-made) of the event".
Trump said the United States would "totally destroy" North Korea if it threatened the United States or its allies.
Elsewhere, gained 0.37% to trade at 1.1985, while edged down 0.08% to 1.3570, off Monday's 15-month highs of 1.3620.
Meanwhile, declined 0.32% to 1.2288. Sterling had strengthened earlier this month after the Bank of England signaled it might raise interest rates as soon as November. But after the Fed meeting Wednesday, investors now see a 75% chance of a rate rise by the end of the year, according to Fed-fund futures tracked by CME Group.
The Australian and New Zealand dollars were stronger, with up 0.20% at 0.7947 and with adding 0.10% to 0.7315. It peaked to hit session high at 112.15 and made session lows at 111.59 levels.
The dollar edged down on the yen in early Friday trade against a backdrop of simmering tensions on the Korean peninsula, though the sharp divergence between US and Japanese monetary policy contained the greenback´s losses.
North Korea said it might test a hydrogen bomb over the Pacific Ocean, in response to US President Donald Trump's recent threat to destroy the reclusive country in a United Nations address. The move also was spurred by the Federal Reserve's policy statement on Wednesday in which it signalled it still meant to raise rates in December.
A ban on textile imports from the North will go into effect immediately, the statement said.
UK's benchmark FTSE 100 closed up by 0.6 percent, the pan-European FTSEurofirst 300 ended the day up by 0.05 percent, Germany's Dax ended flat, France's CAC finished the day up by 0.3 percent.
The geopolitical tensions overshadowed investors' focus this week on the Federal Reserve's next moves. -North Korea tensions even as Apple weighed on the market.
The Dow dipped 53.36 points or 0.2 percent to 22,359.23, the Nasdaq slid 33.35 points or 0.5 percent to 6,422.69 and the S&P 500 fell 7.64 points or 0.3 percent to 2,500.60.
The quake comes as the worldwide community is on a high alert after North Korea's foreign minister threatened on Thursday to test a hydrogen in the Pacific Ocean in response to President Trump's United Nations speech, in which he threatened to destroy North Korea, if they continued to threaten the US and their allies.
The tremor occurred at 4.29 p.m. Prices hovered near support at the 50-day moving average. The WSJ Dollar Index, which tracks the dollar against a basket of 16 currencies, was down 0.3%.
Brent crude rose 43 cents, or 0.8 percent, to settle at $56.86 a barrel, while USA crude settled at $50.66, up 11 cents or 0.2 percent, within a few cents of its May peak.