What are Natural Hazards, Disasters, and Catastrophes?

What are the differences between hazard, disaster, and catastrophe? Here's a list of what defines each event.

Natural Hazard:

Key Attributes:

• a event and natural process.
• a threat to human life and property.
• the process itself is not a hazard, they only become due to humans use of land. 

Disaster:

Key Attributes:

• hazardous event.
• occurs over a limited time span.
• defined area.

Criteria To Be Met(Minimum of One):

1. 10 or more killed.
2. 100 or more affected.
3. State of Emergency declared.
4. International assistance is requested.

Catastrophe:

Key Attributes:

• Massive Disaster
• Requires significant expenditure of money.
• Long period of recovery(often years).