It is normal.
Random Expulsion of Gas
The noises in flatulence are caused by the vibration of the anal sphincter and the expulsion of gas through the rectum. The pitch and volume of the noise can vary depending on the amount of gas present and the tightness of the sphincter.
There is no medical term for that phenomenon.
Fart Gas
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Nitrogen
The least prominent gas in the atmosphere is xenon. It represents no more than one percent on the air in the atmosphere.
A volcano will is generally a prominent feature that stays in one place. Monitoring seismic activity, gas emissions, and shifts in the surface on and near a volcano can be used to determine if an eruption is likely.
The Southeast Region Natural Gas Pipeline Network appears to be the most prominent pipeline. It is located in the US and provides 39 states with the gas supplies they require.
Put a cork in your anus to stop the gas flow.
When? Whenever it can. From where? Mouth, anus, and skin. Lung.
Gas is passed this way through the anus.