There's no such thing as an "eatherquake" in the scientific sense. The term "ether" is associated with a hypothetical medium that was once believed to carry light waves, but it has been largely disproven by modern physics.

It's possible you might be thinking of one of the following:

* Earthquake: These are caused by the sudden release of energy in the Earth's crust, creating seismic waves that travel through the Earth and cause ground shaking.

* Earthquakes on other planets: Other planets and moons can also experience earthquakes, called "marsquakes" or "ioquakes" for example. These are caused by similar tectonic activity or other geological processes.

* Misspelling: Perhaps you're thinking of a term related to weather, like "thunderstorm" or "earthquake".

If you can provide more context or details about what you're looking for, I can try to help you better.