Difference between Static-1 and Static-0 hazard

Static hazard occur in combinational circuits and can be eliminated by using redundant gates. Static hazard is classified as: 

1. Static-1 hazard :
If the output is currently at logic state 1 and after the input changes its state, at the same moment the output changes to 0 before settling on 1, then it is a Static-1 hazard. 

2. Static-0 hazard :
If the output is currently at logic state 0 and after the input changes its state, at the same moment the output changes to 1 before settling on 0, then it is a Static-0 hazard. 

Difference between Static-1 and Static-0 hazard:

STATIC-1 HAZARD	STATIC-0 HAZARD
Output changes from 1 to 0.	Output changes from 0 to 1.
It is false ‘0’ level for a short interval.	It is false ‘1’ level for a short interval.
AND-OR circuit produces static-1 hazard.	NAND-NOR circuit produces static-0 hazard.
The graph goes from high to low then again high.	The graph goes from low to high then again low.
Static-1 hazard with contact networks is a tie set hazard.	Static-0 hazard with contact networks is a cut set hazard.
SOP is used for removing static-1 hazard.	POS is used for removing static-0 hazard.
We deal with 1s in static-1 hazard.	We deal with 0s in static-0 hazard.