The question asks us to identify which option from the list is not an atmospheric natural disaster. Let's break down what that means and examine each option.
Atmospheric natural disasters are extreme events caused by processes happening in the Earth's atmosphere. These often involve weather patterns, temperature changes, or precipitation.
A drought is a prolonged period with below-average rainfall. Since rainfall and weather patterns are part of the atmosphere, drought is considered an atmospheric natural disaster.
A hailstorm involves the formation and falling of hailstones (ice pellets) from storm clouds. Cloud formation, precipitation, and storms are all atmospheric processes. Therefore, a hailstorm is an atmospheric natural disaster.
Frost occurs when the surface temperature drops below the freezing point of water (\(0^\circ\)C or \(32^\circ\)F) and results in ice crystals forming on surfaces. This process is directly related to atmospheric temperature and humidity, making it an atmospheric natural phenomenon, and when severe, a disaster.
An avalanche is a rapid flow of snow (and sometimes ice and rocks) down a mountainside. While snow accumulation (which depends on atmospheric conditions like snowfall) is a prerequisite, the disaster itself is the movement of a mass down a slope. It's more closely related to topography, snowpack instability, and gravitational forces than a direct atmospheric event like a storm or temperature extreme. Avalanches are often classified as geological or geophysical natural disasters rather than purely atmospheric ones.
Based on the definitions:
Therefore, the option that is not considered an atmospheric natural disaster is Avalanche.
The earthquake in Bhuj, Gujarat took place in
Which of the following is not an example of a biological / natural disaster?
A Self Help Group (SHG) in India can be _______.
I. Registered
II. Unregistered
Vulnerability to a particular natural hazard or disaster consists of a set of factors. Which of the following are included in such vulnerability components?
I. Name of any danger or calamity.
II. Vulnerability community encompassing both the terrestrial and marine communities.
III. Material resistivity of physical structures
Which of the following are the components of disaster reduction and management?
I. Hazard analysis
II. Vulnerability analysis
III. Risk analysis