This would wipe out an area equivalent to a mid sized country and would possibly have global effects. The threshold for that is somewhere between 250 meters and a kilometer but we fortunately do not have any data to make that much more precise. You definitely wouldn't shrug your shoulders and get on with life, it would be the most important event in your life assuming it didn't end. Depending on where it happened the economic impact of such an incident would destabilize the world economy for decades.
Not sure why this happened but it went viral in India as a place to practice english for internet points or an online place to for Indians to do endless chit-chat, which is a lot more fun in person there than it is online!
Yep, they've added a ChatGPT answer on top of all the human answers. Although in this case the human answer isn't really better, but it's the fault of the person who asked the question for being vague about the kind of speed they meant.
The more I think about it, this might be a good thing for the world, and amazingly stupid on the part of Quora. Since the whole Quora shtick is to heavily gamify your experience on the site, perhaps knowing there's always going to be an ML 'summary' above your incredibly erudite reply (/s in case it wasn't obvious) will make most people realize "hey...this place actually does suck" and maybe move on to something better...a life or something.
The impact energy of a 400m diameter asteroid is somewhere in the same ballpark as the deployed nuclear arsenal of the United States.
Not extinction-level impact, but wherever it hit would definitely feel it.