[Carl Vehse]

V_TWIN @13: "Unfortunately if something that size hits its not gonna be a local event.....we ALL get it"

Actually, a meteor that size is similar to the one that hit Siberia in 1908. It would take a meteor miles wide to seriously impact everyone on Earth.

[Verginius Rufus]

If the meteor which hit Siberia in 1908 had come 3 hours later it might have hit St. Petersburg, which could have changed world history. Nicholas II killed in 1908, maybe no Russian mobilization in 1914 triggering WWI.

I'm not going to lose sleep over an asteroid which might hit earth in 2046. More than 50% of the earth's surface is oceans so it may just cause a tsunami.

[V_TWIN]

I didn’t say it would seriously impact everyone on Earth.

I said it wouldn’t be a local event.

The 1908 Tunguska event you refer to flattened an estimated 80 million trees over an area (830 sq mi) of forest.

In comparison Washington DC covers 68 square miles and San Francisco covers a land area of 46.9 square miles which means it wouldn’t have to be a direct hit to wipe out a whole city and would still be more than a local event.