Naturally occurring earthquakes Fault types Tectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane. The sides of a fault move past each other smoothly and aseismically only if there are no irregularities or asperities along the fault surface that increase the frictional resistance.
Sitting up, I switch on the bedside lamp. The floor is shaking harder now, and I try to stand. A surge throws me backward.
Suddenly my 14th-floor Santiago hotel room comes alive, like an angry animal shaking a smaller one in its teeth. Around me, pictures thud against walls; drawers open and bang shut; window curtains shriek on their rods. Story continues below advertisement Then the lights go out.
Panic squeezes the breath from me. The cacophony is more unholy in the dark. Trying to cross the rolling floor toward my suitcase at the foot of the bed, I curse myself for having slept naked. I am tossed against the corner of the desk and then to the ground. Lying on my back I yank on pants, then T-shirt and sandals, even as I think, "Just get out!
As I pull myself to standing, sensations and images swarm my mind. I just sense this, profoundly. I careen my way to the bathroom and steady myself under the door frame. Hauling open the door of my room, I expect to find people. Beyond it I see chunks of ceiling plaster pelting down, white dust clouding the air and coating the steps.
Someone tell me what to do. I go back into my room.
Now the quake is subsiding. Furniture is askew, and the floor is littered with objects. Two large lamps have fallen, one just inches from where I pulled on my clothes. A middle-aged man is approaching, his face impassive.
He says, "We should go down. I take the landings too fast, feeling light-headed, sandals skidding on plaster. On a lower floor I merge with a river of people in various stages of undress. We wend our way outside to the tennis courts, where a crowd of several hundred are gathering, comforting one another.
Some are crying; all are dazed. A woman looks like she is about to faint and I steady her. They offer us tablecloths to wrap around ourselves against the night chill, and slippers for those who are barefoot.Earthquake definition is - a shaking or trembling of the earth that is volcanic or tectonic in origin.
How to use earthquake in a sentence. a shaking or trembling of the earth that is volcanic or tectonic in origin; upheaval. - The Great Kanto Earthquake also known as the Tokyo-Yokohama Earthquake of hit the metropolitan area of Kanto on September 1st, around pm.
It was a on the Richter magnitude scale, killing over one-hundred and forty thousand people due to its high magnitude and the time it happened. Earthquake. The sudden movement of the Earth caused by the abrupt release of accumulated strain along a fault in the interior.
Seismic waves continue to travel through the Earth after the fault motion has stopped. ecordings of earthquakes, called seismograms, illustrate that such motion is recorded all over the Earth for ours, and even days, after an earthquake.
Earthquake: Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth’s rocks. Earthquakes occur most often along geologic faults, narrow zones where rock masses move in relation to one another. Learn more about the causes and effects of earthquakes in this article.
The point where the earthquake originates is the seismic focus, and directly above it on Earth's surface is the earthquake's epicenter. Three kinds of waves accompany earthquakes. Primary (P) waves have a push-pull type of vibration.
The total amount of energy released by an earthquake is measured on the Richter scale. On this scale, each increase by 1 corresponds to a tenfold increase in earthquake strength.
Thus an earthquake measuring on the Richter scale is 10 times stronger than one measuring Earthquakes above 7 on the Richter scale are severe.