The Earth spins like a carousel. When weight is shifted from one side of the carousel to another, or even just moved by a few feet, the carousel wobbles just a bit.
Any major earthquake causes some movement of the tectonic plates, and thus can "shift the Earth's axis" by just a bit. VERY powerful earthquakes, such as the ones in December 2004 or March 2011 can jiggle it measurably, especially using super-sensitive instruments like GPS satellites.
north pole
The earths tilt at its axis
The season
south
Earth's climates might be different because they won't be the same
The Earth's AXIS changed 10cm after the tragic earthquake
Because Earths axis is tilted.
intersect
The axis
1. Tilt of earths axis 2. Earths axis remains parallel throughout its yearly orbit.
Seasons
north pole
The earths tilt at its axis
No
About 8,000 miles.
orbit of the moon
23.5 degrees.