The pan-European FTSEurofirst 300 index .FTEU3 lost 1.19 percent. South Korea's KOSPI fell 1.8 percent to almost a three-month low.
Earlier, Trump warned North Korea on Tuesday it would face "fire and fury" if it threatens the United States, prompting the nuclear-armed nation to say it was considering firing missiles at Guam, a US -held Pacific island.
In New York, the Dow Jones industrial average plunged 204.69 points to 21,844.01, while the S&P 500 index dropped 35.81 points to 2,438.21 and the Nasdaq composite index slid 135.46 points to 6,216.87.
Overseas, European markets were trading lower by noon on the continent, while the Nikkei 225 in Japan doffed 0.1%, and Shanghai's CSI 300 fell 0.4%.
However, market watchers said equity markets remained focused on the deepening geopolitical crisis, as angry threats from Washington and Pyongyang stoke fears of a catastrophic miscalculation with global consequences.
"Of course it's all come at a time when share markets are due for a correction, so North Korea has provided a flawless trigger", he added. Meanwhile, the dollar USDJPY, -0.31% fetched ¥109.69, compared with ¥110.31 late Tuesday.
"We should also consider the upcoming election, which is now looking to be a very tight race".
"The story today is North Korea and there was nothing in the earnings that was bullish enough to pull people away from focusing on North Korea", said Chuck Carlson, chief executive officer at Horizon Investment Services in Hammond, Indiana.
The spot gold price was up 0.7 percent at $1,286.07 per ounce by 1400 GMT, after hitting an earlier high of $1,286.40, its highest level since June 8.
Investors see shine in gold amid growing tensions between US and North Korea
The euro edged down 0.1 percent to $1.1735.
The greenback also came under pressure after New YorkFederal Reserve President William Dudley cautioned it would "take some time" for USA inflation to reach the bank's two percent target, the latest warning price pressures remain muted. Macy's sank 10.3 percent and Kohl's lost 5.8 percent.
The euro eased 0.1 per cent to $1.1766, staying below a high of around $1.1910 set last week, the euro's strongest level in 2-1/2 years.
The Nasdaq, Wall Street's home to many high profile tech companies, finished the day down more than 2%.
Head of commodity strategy at Saxo Bank, Ole Hansen, told Reuters he sees further rises for gold, albeit under a ceiling: "The market hates uncertainty and that's certainly what we have now".
Benchmark U.S. 10-year notes last rose 6/32 in price to yield 2.1905 percent, from 2.211 percent late on Thursday.
"The market had been complacent for a while regarding headlines from North Korea". Brent crude, used to price worldwide oils, declined 23 cents to $51.67 per barrel in London.
The euro dipped 0.1 per cent to $1.1733 but the single European currency has been slipping this week against the dollar, having hit a more than 2 1/2-year high of $1.1892 on August 2. Humana rose $4.74, or 1.9 percent, to $254.96.
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IPG Investment Advisors LLC's holdings in Tesla were worth $6,651,000 as of its most recent filing with the SEC. But Musk says Tesla worked hard to make the Model 3 simpler and cheaper to make than Tesla's previous vehicles.
Two killed as typhoon slams Japan
These flights include those scheduled to fly from Tokyo's Haneda airport to regions in central and western Japan. The maximum wind speed near the center was 126 kph, and the maximum momentary wind speed was 180 kph.
Good day and reasons to call 811 before digging
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