What causes a vertical crack in sheetrock

[SSEiYah]

I bought a fairly new house, recently, ~10 years old. A big 9 foot tall narrow crack appeared from the floor to the ceiling in the last week or so in the living room. The crack is the same width on the floor as it is on the ceiling, about 1/16th of an inch. No other cracks in the house, the brick is fine on the outside. I'm just wondering what causes these types of cracks. It seems like a horizontal shift in the house occurred, but I dont know why.