At first I was going to say if it exploded over the US it would not affect Europe and Asia. Then I remembered Cassiodorus 536 ad.
reativehistorystories.blogspot.com/2022/01/darkness-that-was-felt-nuclear-winter.html
This article explains how Cassiodorus and other Mediterranean writers and hostorians wrote of the terrible loss of sun, and famine that occorred at 536 and 537. Initially it was thought to be a volcano in Iceland or perhaps the far east. Then in 2004 scientists reported that tree rings in Ireland indicated a possible air burst as the cause. So perhaps the scientists in this articles have found the cause of a major disaster in human history worldwide. More interesting argicles that I have not yet read at: https://www.google.com/search?q=cassiodorus%2C+approximately+536+report+on+strange+weather&rlz=1CAJCUZ_enUS847&sxsrf=APq-WBsf_jzk9XdecCfTO_P5H2v0jfvDWA%3A1643907407640&ei=Twn8YZTFJtjNytMPzLIK&ved=0ahUKEwjUqM2ogOT1AhXYpnIEHUyZAgAQ4dUDCA4&oq=cassiodorus%2C+approximately+536+report+on+strange+weather&gs_lcp=Cgdnd3Mtd2l6EAw6BwgAEEcQsANKBAhBGABKBAhGGABQwQZY5hBggjpoAXACeACAAeEJiAHyEpIBAzctMpgBAKABAcgBCMABAQ&sclient=gws-wiz
Fascinating!
What a find!
Thank you for sharing it. I figured the Romans would have seen something.