Which statements describe the magnitude of an earthquake? Check all that apply.

It is detected by a seismograph.

It is measured by the Mercalli scale.
It is based on the size of seismic waves.

It is affected by the amount of fault movement.

It is used to determine damage caused by earthquakes.

ANSWERS:1,3,4

So you can cross 4 off and 3. So the answer is 1.

Step-by-step explanation: A magnitude of an earthquake is detected by a seismographic meter. So this is your answer. I hope this helps you!

your answer is the frist one

hop i

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m