Chelyabinsk Superbolide 2013年車里雅賓斯克小行星撞擊事件

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Chelyabinsk Superbolide
http://www.amazon.com/Chelyabinsk-Superbolide-didnt-that-coming-ebook/dp/B00GWWCKK8

2013年車里雅賓斯克小行星撞擊事件

From Wikipedia (http://en.wikipedia.org/wiki/Chelyabinsk_meteor):
The Chelyabinsk meteor was a superbolide caused by a near-Earth asteroid that entered Earth's atmosphere over Russia on 15 February 2013. The object was undetected before its atmospheric entry, in part because its radiant was close to the Sun. Its explosion created panic among local residents and about 1,500 people were injured seriously enough to seek medical treatment. All of the injuries were due to indirect effects rather than the meteor itself, mainly from broken glass from windows that were blown in when the shock wave arrived, minutes after the superbolide's flash. Some 7,200 buildings in six cities across the region were damaged by the explosion's shock wave, and authorities scrambled to help repair the structures in sub-zero (°C) temperatures.
With an estimated initial mass of about 12,000–13,000 metric tonnes[7][8][9] (13,000–14,000 short tons, heavier than the Eiffel Tower), and measuring about 20 metres in diameter, it is the largest known natural object to have entered Earth's atmosphere since the 1908 Tunguska event, which destroyed a wide, remote, forested area of Siberia. The Chelyabinsk meteor is also the only meteor confirmed to have resulted in a large number of injuries.




Blurb:

Yes, we didn't see that one coming! But... we learn from our mistakes!
What a neighborhood! Don't you hate bad neighbors? Our planet has plenty of those. We met one over central Russia at 9:20 local time on the morning of Friday, February 15, 2013.The Chelyabinsk Superbolide has now become a template to understand, manage and mitigate future impacts.
In six engaging chapters, the authors present an easy to read and updated introduction to the topic of asteroid impacts. Starting with a tour of the neighborhood, two case studies follow: the 2002 EM₇ incident and the Almahata Sitta event. Then, the largest impact on Earth in the 21^st century, the Chelyabinsk event. But the sky is not falling and the next chapter shows that the current impact risk is not higher now than it was 25, 100 or 500 years ago. The final chapter focuses on the expected contribution of the Gaia mission to improve readiness against impacts.
The authors, who published one of the first solutions for the orbit of the parent body of the Chelyabinsk Superbolide, adopt a neutral point of view avoiding unrealistic alarmism and paying particular attention to what is being done to deal with this problem. Chelyabinsk-like events have happened in the past and they will repeat in the future. There is little doubt about that. Humanity has coexisted with impacts for as long as we (or our records) can remember. The risk has always been there but our ability to evaluate and face that risk is far better now and it will improve in the near future.