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When the (Chicxulub) asteroid hit Yucatan, what was it like in the minutes, days and weeks afterward on distant locations on Earth?

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  • $\begingroup$ I guess you are refering to all possible effects like Earthquakes, loudness / shockwave, (dust) cloud cover, tsunamis, long-lasting winter just to name a few? $\endgroup$ – B--rian Mar 18 at 9:11
  • $\begingroup$ The Deccan Traps formed at roughly the same time and are (very) roughly antipodal to Chicxulub. AFAIK there is no evidence that there is a causal relationship between them. It is certainly possible, though, that the impactor directly caused the Traps to form. $\endgroup$ – Alex Hajnal Mar 18 at 12:44
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    $\begingroup$ @AlexHajnal is there any big scale geology - physics reason to expect something like that being triggered right at the antipodes of an impact? In Wikipedia, emphasis is given to the antipodean position but not reason is mentioned. It is just that the apparent coincidence is taken as suggestive, or one can think of wave patterns etc... $\endgroup$ – Alchimista Mar 18 at 14:05
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    $\begingroup$ @Alchimista The surface wave from an earthquake spread out along the surface, roughly forming a ring that grows in size as time goes on -- until the wave forms a great circle. The propagating ring then shrinks until it meets itself at the antipode. While there's been a lot of attenuation, there is still quite a bit of energy that concentrates at the antipode. $\endgroup$ – David Hammen Mar 18 at 16:44
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    $\begingroup$ All of the descriptions I've seen talk about years, decades, centuries after the event. I am curious about the day of the event and several days afterwards. $\endgroup$ – stretch Mar 20 at 21:54

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