On 13 April 2029, asteroid Apophis will briefly come within 32 000 km of Earth’s surface. It will be the closest approach of an asteroid of this size that humans have ever been aware of in advance.

During the approach, Apophis will be affected by Earth’s mighty gravity. The side of the asteroid nearest Earth will be pulled towards our planet more strongly than the side farther away, resulting in tidal forces that will stretch and squeeze it, perhaps triggering quakes and landslides, and change the way it rotates.

Posting an alternate source for some more detailed info relative to another shared article.