Earthquake Monitoring

A Comparison of Analog and Digital Seismograms

Here is an image of an analog recording of an earthquake.The relatively flat lines are periods of quiescence and the large and squiggly line is an earthquake.

Image of a classic analog seismogram

Below is a digital seismogram. The data is stored electronically, easy to access and manipulate, and much more accurate and detailed than the analog recordings.

Image of a Digital seismograph


Seismograms: Analog vs. Digital

Earthquake research has assisted engineers in determining better construction and design of retrofitting of homes and buildings that can withstand the shaking that earthquakes generate. Earthquake information, such as location, magnitude, and shaking distribution, is immediately available within minutes after an earthquake to everyone via broadcast media or the internet.

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