Thursday 13 May 2021

What Would Happen If 13.0 Earthquake Hits?

Ridddle on Youtube shows What Would Happen If 13.0 Earthquake Hits.

It seems that earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake. A fault is a break in the rocks that make up the Earth's crust, along which rocks on either side have moved past each other. It seems that no fault long enough to generate a magnitude 10 earthquake is known to exist. If it did exist, it would extend around most of the planet.

The largest earthquake ever recorded was a magnitude 9.5 on May 22, 1960 in Chile on a fault that is almost 1,000 miles long.

For most earthquakes, the faults do not break the surface, so the faults can be "seen" only through analysing the seismic waves. Faults can be anywhere from metres to a thousand kilometres long.

Earthquakes occur on faults - strike-slip earthquakes occur on strike-slip faults, normal earthquakes occur on normal faults, and thrust earthquakes occur on thrust or reverse faults. When a certain earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other.

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