Gravity waves, (not to be confused with ripples in space-time known as “gravitational waves”) distribute energy and momentum throughout the atmosphere. The more intense the storm, the greater the amount of energy that is transferred. These waves exist all the time, even on clear days, and waves in the troposphere can often be seen in the infrared and visible imagery. However, strong convection from storms can cause a bunch of energy to be released, which is then transferred to the upper atmosphere.

The most intense storms (as well as violent volcanic eruptions) have enough force to generate mesospheric gravity waves. These are gravity waves near the mesopause, the boundary between the mesosphere and the thermosphere, where Earth’s atmosphere meets space.

Source: https://www.nesdis.noaa.gov/news/guide-understanding-satellite-images-of-hurricanes

Same. I thought gravity waves could only be measured with extremely sensitive instrumentation. I think she might also be confusing km and miles