Earthquakes vs rock blasts

Hi there,

I was wondering how to differentiate between earthquakes/rock blasts on waveforms and spectrogram. Below are what I believe to be small, local tremors but could they be nearby rock blasts or do the waveforms better indicate earthquakes?

Thank you.

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Hello VS1,

I have found this peer-reviewed article from 2008 that could help in answering your query:

There are differences between blasts and earthquakes, because the forces involved in each are very different, the waveforms that each creates look different.

Another article (a bit more technical) can be found here:

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