Is the word seismo a Greek prefix meaning earthquake?

That's almost right! "Seismo" is a Greek prefix, but it means earthquake or earth tremor, not just "earthquake".

Here's a breakdown:

* Seismos (σεισμός): The Greek word for "earthquake" or "earth tremor"

* Seismo- (σεισμό-): The Greek prefix derived from "seismos"

So, the prefix "seismo-" is used in many words related to earthquakes, such as:

* Seismology: The study of earthquakes

* Seismograph: An instrument used to detect and record earthquakes

* Seismogram: The record of an earthquake produced by a seismograph

Let me know if you have any other questions about Greek prefixes!