European natural gas futures extended losses in after-hours trading on Thursday after climbing to their highest levels in over three years in the previous session.
Front-month Dutch TTF futures fell 3.306% to 71.200 euros ($82.84) per megawatt hour, while UK NBP futures declined 3.168% to 176.380 British pence ($2.39) per therm.
This week's military escalation between the US and Iran has marked the most intense exchange of strikes between the two sides since July, with neither side willing to relinquish control of the Strait of Hormuz.
While the situation remains unresolved, Europe is entering the winter season with low gas inventories and elevated prices, leaving the continent's energy sector vulnerable to further supply disruptions.
Bloomberg reported on Thursday that French utility Electricite de France extended a maintenance outage at its Gravelines 5 nuclear reactor until Jan. 25, adding seven weeks to the planned schedule and cutting power capacity during peak winter heating demand.
European gas inventories stood at 65.10% of capacity, compared with 82.59% during the same period a year earlier, according to Gas Infrastructure Europe. Inventories were also well below the five-year average of 82.7% for this period, according to the Swiss Federal Office of Energy.
A prolonged closure of the Strait of Hormuz could push Europe's benchmark gas price to 80 euros/MWh in the fourth quarter, representing roughly another 10% increase from already elevated levels, Dutch bank ABN Amro said on Thursday, Montel reported.
With gas storage at such low levels ahead of the coming winter, Europe still needs to buy over $8.1 billion worth of gas at current prices to reach even its lowest storage target of 75%, OilPrice.com said, citing Bloomberg calculations.
At present, LNG netbacks favor sending spot LNG to Europe over Asia, according to ING analysts, after months in which Asian buyers outbid Europe for spot supply.