this question isn't discriptive enough of what your asking. there are many things you can use though for an earthquake but the object that mesures how strong the earthquake is a seismograph
they use earthquake kits, MEDCs build earthquake proof buildings and use earthquake proof tables.
Yes, Gallade is able to learn Earthquake through the use of the Earthquake TM.
Use a Pokemon who knows an earthquake.
A Richter scale measures the power of a earthquake
Nidoking can only learn Earthquake when you use TM26 on it.
You have to use the TM to teach Blaziken Earthquake.
They use a seismograph
Metagross can only learn Earthquake with the use of a TM.
Yes, Venusaur can learn Earthquake, though not by level up. It learns it through the use of the Earthquake TM.
You have to use the TM10 to get earthquake. Venasuar doesn't learn it on its own
Gastrodon does not learn Earthquake naturally, but it can learn it through use of a TM.
It doesn't learn Earthquake through level up, but it can learn it through the use of the Earthquake TM.