The US Dollar is up against almost every major currency, uncluding the British Pound. It's up against the Franc (though way off of ath's), the Yen, the Krone, etc. It's a safety trade, the European economy is much more fragile than the US's. China and Russia are testing the waters on how far they can push things, so the dollar gets bought up. If Russia cuts off Nord Stream it will be quite disastrous for most every country in the region sans Norway because it's essentially a petrostate.

People seem to think that if Ukraine collapses and Russia just takes it that the EU/US will just be able to back off, but that's not in the cards.