What drew my attention, was that in the aftermath of the earthquake when conducting classic epidemiologic studies seems rather impossible due to critical situation, hence RHA is a good alternative solution.

In an RHA, data gather and analyze in the following areas:

· The general content of the disaster

· Disaster related factors, which may have an immediate impact

· Possible immediate environmental impacts of disaster

· Unmet basic needs of disaster survivors

· Potential negative environmental consequences of relief operation