When you consider the size of our orbit it is amazingly close. lots of things cross our orbit every year but we are elsewhere at the time. Sooner or later though just like a slot machine we will hit the jackpot and catch one head-on. The last big one landed in Northern Siberia and caused massive damage...to a bunch of trees. There are fewer places all the time that that can happen. Any ocean strike has the potential of causing massive wave damage to coastal or island places. Even one as small as this one though would be a big problem if it hit a populated area.
We are a lot like those clay pigeons that they used to have in shooting galleries when I was a kid. Sooner or later we will get hit again. that is just the luck of the draw. What is just stupidity is the human penchant for building big cities in the shadows of active volcanos or on flat coastal islands that are sooner or later going to be wiped off by storms or tsunamis. That is not to mention the ones atop known massive fault lines. People seem to love the excitement of living under the ax.
We have actually had a rather amazing period of relative calm. We have had a few major earthquakes and a couple of major tsunamis but no asteroid or comet strikes and no major volcanic eruptions. I guess that we have been busy enough killing each other so Nature has let us do her killing.
The next big urban volcano eruption will make all in the past seem like little more than a burp as far as the cost in human lives. we are reaching to point of becoming like petulance and the cost of the damage is growing geometrically and will eventually reach the point of people being unable to recover or rebuild. A major disaster in a MAJOR urban area could easily cause damage that cost more than the annual production of our country. How do you fix a flattened NYC or LA? How do you reestablish things like Wall Street?
Every nation has so much of their entire economy tied up in just a few big cities that the loss would decimate their national economy. The original reason for the big cities has passed and we need to spread out now. The big factories have mostly been shipped to other countries. Wallstreet is computerized and face to face meetings don't have to be done in person any more.
It is actually pretty amazing that they spotted it as soon as they did. It is sort of like spotting a grain of sand on a basketball court from the top of the bleachers with weak cheap binoculars. This thing is tiny when looked for in an area the size that we have to watch. We do an amazing job of sky watching these days. Now if we can just get back into space so that we won't just be stuck sitting here WATCHING as the hammer falls on us. It has really sucked having to hitch a ride with the Russians in order to even get a man into orbit!!!!