Question

1. Why are earthquakes monitored worldwide instead of in earthquake-prone areas only?

2. How many seismographs are needed to find the epicenter of an earthquake? Why is this
number significant?

Answer 1

1. Why are earthquakes monitored worldwide instead of in earthquake-prone areas only?

Earthquakes are monitored worldwide instead of just earthquake-prone areas since earthquakes can happen all over the world, even far away from plate boundaries.

2. How many seismographs are needed to find the epicenter of an earthquake? Why is this number significant?

You need at least three seismographs to find the epicenter of an earthquake. The reason you need three or more seismographs is so you can see where the waves overlap to find the epicenter.

Answer 2

earthquakes are monitored worldwide because we never know when they will occur, they can happen everywhere in the world even in the areas that are far away from the tectontic plates boundaries. that is why earthquakes are monitored worldwide instead of in earthquake-prone areas only.