Slow Slip Events (SSEs) occur at the deeper part of subduction zones. Unlike regular earthquakes that release energy in seconds, these “silent” earthquakes release energy over days, weeks or even months. They are detected by GPS sensors rather than traditional ...
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S-waves are shear waves that move by displacing atoms perpendicular to the wave’s path. This requires “shear strength,” which only solids possess. Since the outer core is a liquid (molten iron and nickel), it has no shear strength, causing S-waves ...
The Richter scale “saturates” (fails to distinguish) between very large earthquakes (above 7.0) because it only measures peak wave amplitude. The Moment Magnitude Scale (Mw) measures the total energy by considering the fault area and the amount of slip, providing ...
The Moho is the boundary between the Earth’s crust and the mantle. It was discovered because P-waves traveling through the deeper mantle arrive at distant stations faster than those traveling through the shallower crust. This indicates that the mantle is ...
The Richter and Moment Magnitude scales are logarithmic. Each increase of one magnitude releases about 32 times more energy. From magnitude 6.0 to 8.0 is a two-step increase, so the energy released is 32 × 32 = 1,024 times more. ...