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[ ♪ ]

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Mars in a Minute

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Are there earthquakes on Mars?

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Or, rather, marsquakes?

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Quakes on Earth happen
many times a day,

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largely due to continental
plates shifting

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as they float on
the mantle below.

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That's called plate tectonics.

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Mars doesn't seem to
have plate tectonics,

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but other things can make the
ground shake, too, like:

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cracking caused by
contraction from coolilng;

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magma moving and creating
pressure deep underground;

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or even meteorite impacts.

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Quakes of any kind
send seismic waves

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around and through the planet.

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Scientists can study
how those waves

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bounce off layers
deep underground,

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to help understand what a
planet's interior is like.

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NASA's InSight lander carries
a super-sensitive instrument

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to measure marsquakes

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and could detect dozens of
them during its mission.

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Each one can tell us a lot
about what's going on

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inside that mysterious
red planet

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and, maybe, about how all the
rocky planets came to be.

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NASA Jet Propulsion Laboratory