How big does a earthquake have to be before it is called big?

How high does an earthquake, i think its called a seismograph, how high does it go up to?

  • Answer:

    Seismographs record seismic waves from earthquakes. They receive frequencies from several hundred hertz down to 4.5 Hz or even as low as 1 Hz with higher quality models.

Courtney K. at ChaCha Visit the source

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