GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is an area along a seismically active fault where no earthquake activity has occurred over a long period of time?
A
Aftershock
B
Liquefaction
C
Seismic Gap
D
Tsunami
Explanation: 

Detailed explanation-1: -Seismic gaps-A seismic gap is a zone along a tectonically active area where no earthquakes have occurred recently, but it is known that elastic strain is building in the rocks. If a seismic gap can be identified, then it might be an area expected to have a large earthquake in the near future.

Detailed explanation-2: -Seismic Gap – An area along a seismically active fault where no earthquake activity has occurred over a long period of time.

Detailed explanation-3: -Seismic Gap. Seismic Gap. Region along an active fault where stress is accumulating because no earthquakes have occurred there recently. Seismic gaps are often flanked by areas that have experienced earthquakes in the near past.

Detailed explanation-4: -earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Seismic waves are produced when some form of energy stored in Earth’s crust is suddenly released, usually when masses of rock straining against one another suddenly fracture and “slip.”

Detailed explanation-5: -The shadow zone is the area of the earth from angular distances of 104 to 140 degrees that, for a given earthquake, that does not receive any direct P waves. The shadow zone results from S waves (not shown in animation) being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.

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