Geography 2152F/G Chapter Notes - Chapter 3: Infrasound, Blast Wave
23 Dec 2018
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Infrasound are soundwaves that are too low for us to hear. The chelyabinsk meteor fragments were found to be 90% rock and 10% metal. Density is a big determinant of the damage it can inflict. Rocky asteroids like this one are much less resilient when hitting the atmosphere. Angle meant that the entry had to be quite shallow. Because of this, much of the energy of the blast wave was expended as it moved horizontally. They track known asteroids and search for new ones every day; focus on larger rocks. Plans to use an infrared telescope in space in order to better detect these objects.
