It won’t, but if the calculations were off and it did, do we have a rough idea of where?
I suppose it depends on how the calculations were off.
The closest approach appears to be over the Indian Ocean (approximately 6° S by 97.5° E per a NASA estimate). The nearest landmass to that point appears to be Sumatra. The size of the asteroid is such that it would probably disintegrate in the atmosphere, albeit with an impressive conversion of kinetic energy in a massive thermal blast and attendant shockwave, but it would be unlikely to generate a significant tsunami or other seismic effects.
Stranger
Hijacking: NASA (via Astronomy.com) says http://www.astronomy.com/~/link.aspx?_id=dfefa5e9-cd1e-4d0d-a81c-0a8b67308c7a]says 2012 DA14 will pass 17,200 miles away from Earth. Is that figure calculated from the center or surface of our planet?
Fixed link. A page linked to from that one says
The Impact Earth calculator suggests that even if it hit a major city the damage wouldn’t be too severe since most of it would break up before it reached the ground; a few pieces might make it, with the main effect being a boom and 100 mph shock wave:
I doubt it would be visible from Earth because of its small size but is there any chance of getting photos of it from our satellites with Earth in the background? That would make a cool desktop pic.
The article ZenBeam linked says: “The asteroid will fly by our planet quite rapidly, at a speed of about 17,400 mph (28,000 km/h) in a south-to-north direction with respect to Earth.” So it’s gonna be a blurry picture.
That article seems to suggest that it would cause a Tunguska-type event, but the Impact Earth calculator suggests a much milder event; for comparison, they give an airblast of 600+ mph (at 1 km) for the Tunguska event, which is far greater despite being only about 1.33 times bigger, using their size of 60 m, twice what the Yahoo article gives (in diameter, 2.4 times the volume/weight if of the same composition).
Looks like it will be televised live at NASA Live - NASA tomorrow at 2:00 P.M.