Question

What does frequent earthquake suggest about the movement of the lithosphere?what does the concentration of earthquake activities to certain parts of the Earth tells us about earthquake

Answer 1

★ veryfied answer ★

->> This non-stop movement causes stress on Earth’s crust. When the stresses get too large, it leads to cracks called faults. When tectonic plates move, it also causes movements at the faults. An earthquake is the sudden movement of Earth’s crust at a fault line.

By looking at the amount of time between the P and S wave on a seismogram recorded on a seismograph, scientists can tell how far away the earthquake was from that location. However, they can’t tell in what direction from the seismograph the earthquake was, only how far away it was. If they draw a circle on a map around the station where the radius of the circle is the determined distance to the earthquake, they know the earthquake lies somewhere on the circle. But where?

->> Scientists then use a method called triangulation to determine exactly where the earthquake was (see image below). It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. If you draw a circle on a map around three different seismographs where the radius of each is the distance from that station to the earthquake, the intersection of those three circles is the epicenter!

Answer 2

The earth surface is created of four essential layers:

• a solid crust
• a solid mantle
• a liquid outer core
• a solid inner core

The geosphere is that the solid crust and prime of the mantle. It's not a continuous layer. Instead, it's created of tectonic plates everywhere the layer.

• The tectonic plates are in constant motion, resulting in stress on the Earth's crust.
• Fault lines are created whenever there's severe stress.
• An earthquake happens because of the sudden moments within the fault lines.
• A region like China, Indonesia, and Iran is very vulnerable to earthquakes.
• This is as a result of these places sitting upon the fault lines.
• The scraping of the tectonic plates against one another leads to the earthquake.

Therefore, some regions ar a lot of vulnerable to earthquakes than others.