The frequency with which these hazards occur is not known because of the difficulty in studying its use among those who use it secretly.

However, some hazards, such as lahars and debris avalanches, can occur even when a volcano is not erupting.

In this scenario it is quite difficult to see how a hazard could occur if the circuit is built up on the same couple of chips.

HSE publishes practical guidance on where hazards occur and how to control them.

Moral hazard can occur when upper management is shielded from the consequences of poor decision making.

A moral hazard can occur when this relationship is interfered with, often via government policy.

After a hazard has occurred, governments must provide services such as fire fighting, rescue, emergency medical, health and sanitation.

Active - A harmful incident involving the hazard has actually occurred.

A hazard occurs when two or more of these simultaneous (possibly out of order) instructions conflict.

A structural hazard occurs when a part of the processor's hardware is needed by two or more instructions at the same time.