Probabilities and forecasts are rather like climate probabilities and weather forecasts, while predictions are more like statements of when, where, and how large, which is not yet possible for earthquakes. These stresses may be sufficient to cause failure along existing fault planes, giving rise to intraplate earthquakes.Figure 4.

Seismologists are still researching the interactions between movement of magma in the crust, and related slippage along faults that may be caused by the pressure and movement of the magma.About 90% of the world’s earthquakes and 81% of the world’s largest earthquakes occur along the Ring of Fire. The topmost, brittle part of the Earth’s crust, and the cool slabs of the tectonic plates that are descending down into the hot mantle, are the only parts of our planet which can store elastic energy and release it in fault ruptures. When the earth moves during an earthquake, a piece of paper rolling beneath the stylus moves with the earth, but the stylus, with its weight suspended on springs, remains stationary, drawing lines on the sheet of paper that show the seismic motions of the earth. Examples are the earthquakes in Chile, 1960; Alaska, 1957; Sumatra, 2004, all in subduction zones. The damage caused by an earthquake is likely to be greatest A. far from the epicenter B. at a point below the focus C. on a normal fault D. near the - 3362969


Damage is likely to be caused by falling objects in buildings.

Liquefaction occurring beneath buildings and other structures can cause major damage during earthquakes.

30,000: 5.5 to 6.0: Slight damage to buildings and other structures. This level of intensity may be reached with earthquakes with a magnitude of around 4.7 or greater.Likelihood of damage to buildings such as cracks in plaster.

Serious damage.
Earthquakes in that area may be due to the Yellowstone hot spot causing differential thermal expansion of the lithosphere in a broad zone round the hot spot center.Several East Coast cities, including Boston, New York, and Charleston in South Carolina, have experienced damaging earthquakes in the last two centuries.

Earthquake damage at Molalla High School following the Spring Break Quake in 1993.

Indonesia lies between the Answer the question(s) below to see how well you understand the topics covered in the previous section. Aerial photo of the San Andreas Fault in the Carrizo Plain, northwest of Los AngelesThis is so because the energy released in an earthquake, and thus its magnitude, is proportional to the area of the fault that ruptures and the stress drop.

Sectors of the Hawaiian islands occasionally slump along normal faults, producing intraplate earthquakes.

Can totally destroy communities near the epicenter. This is evident in such places as the San Andreas fault zone of California, where a transform fault cuts through continental crust and earthquakes there sometimes exceed 7.0 in magnitude.Convergent plate boundaries are dominated by compression. United States Geological Survey (USGS) Natural Hazards Response; 2012; FS; 2012-3061; Lamb, Rynn; Jones, Brenda K.

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In some cases, the land may even liquefy, behaving like quicksand and causing buildings to sink or topple over. Danger levels earthquakes Earthquakes are caused by a sudden release of stress along faults in the crust. The combination of soft sediments with loosely packed grains and high groundwater levels is significantly likely to cause _____ during earthquakes.


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