GEOLOGY

Detailed explanation-1: -In fact, a big reason many people don’t feel earthquakes is that they’re simply not situated well enough during the shaking. Alternatively framed: they’re within the perceptible radius of the quake, but are not paying enough attention.

Detailed explanation-2: -Theoretically, seismic waves travel in all directions causing “perceptible quake” for nearby regions and “non perceptible quake” for other regions. The energy of the earthquake will be absorbed in earth layers and tectonics.

Detailed explanation-3: -In general, a magnitude 3 earthquake is about the smallest that one can feel. A magnitude 1 quake produces the same amount of energy as a small blast at a construction site (6 oz.

Detailed explanation-4: -Sensitive seismographs, which greatly magnify these ground motions, can detect strong earthquakes from sources anywhere in the world.