unexpected capital gains distributed in december should i make a 4th quarter estimated payment?

i have gotten my tubro tax refunds the past few years since i withhold significant funds from my pension and social security to cover my projected taxes. this year december 2024 i see my online brokers accounts distributing to me unexpected sizable capital gains distributions. should i file a online federal estimated tax payment in the 4th quarter or would safe harbor exempt rules apply to me for paying 100% in prior years?

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