• civylw@lemmy.world
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    6 months ago

    There are two types of seismic waves, primary waves and secondary waves. Primary waves, also known as P waves or pressure waves, are longitudinal compression waves similar to the motion of a slinky. Secondary waves, or S waves, are slower than P waves. S waves are the destructive ones.

    • Echo Dot@feddit.uk
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      6 months ago

      It also requires cross jurisdictional interactions which is something else the US has an issue with.