Simplify the following definition: 
"The magnitude of an earthquake is a measure of the energy released during the event and is based on the amplitude of the waves recorded on a seismograph."
The magnitude of an earthquake indicates how much energy is released and is calculated using the size of waves recorded on a seismograph.
Complete the following task based on the instruction and optional input provided.### Instruction:
Simplify the following definition: 
"The magnitude of an earthquake is a measure of the energy released during the event and is based on the amplitude of the waves recorded on a seismograph."

### Output:
The magnitude of an earthquake indicates how much energy is released and is calculated using the size of waves recorded on a seismograph.