NEED HELP WITH THESE QUESTIONS AND THE ANSWERS HAVE TO BE FROM ARTICLE , PLEASE
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NEED HELP WITH THESE QUESTIONS AND THE ANSWERS HAVE TO BE FROM ARTICLE , PLEASE HELP
UNIVERSITY OF MINNESOTA INNE Minnesota at a Glance Earthquakes in Minnesota 187 Few natural phenomena attract as much public attention EARTHQUAKE as earthquakes. Seldom does a month go by that we do not hear of a destructive earthquake somewhere in the world. Events like the October 17. 1989 event near San Francisco [Loma Prieta earthquake] and the January 17. 1994 event near Los Angeles [Northridge earthquake] are grim remind- ers that parts of the United States are at risk from these terrible natural hazards. Even in the so-called stable interior of the United States, a strong public interest exists in earthquakes, as does some concern about the potential of destructive earth quakes in the Midwest Earth Tremor Felt All Over Northern Minnesota, Accord ing to Reports--Houses Said to Have Been Shaken Down at Bemidji--Chimney Knocked Down at Brain erd--No Damage Here, Although Shock Was Felt in Nearly Every Building-Roar Like That ofAutomobile Truck Engine Accompanies Quake An earthquake which shook nearly chimney was knocked down in the all of northern Minnesota was felt northem part of the city Except in Little Falls between 3 and 3:30 that reported from Bemidji, there Monday afternoon The shock was was no other damage, as far as can felt in every building in Little Falls be leamed. At Lincoln, people in What Causes an Earthquake? Earthquakes are produced by movement of rock in the earth's interior. In volcanic regions, movement of molten rock and was strong enough to rattle boats on the lake felt the quale glassware and windows in manyhe shaking of the ouilaings wasExplanation / Answer
1. Earthquakes are caused by the movement of rock inside earth’s interior region. Also whenever there is a movement of solid masses past one another along a fracture plane. This is known as faults. This type of movement produces a series of waves through the earth. However, This movement is perceived as an earthquake. However, The center of an earthquake is several miles beneath the earth surface. Some earthquakes are caused by the movement of faulting and magma at spreading centers. Large earthquakes are caused along faults where plates grind together.
2. Earthquake focus is several miles beneath the earth surface and may or may not produce the evidence of sense of movement While Epicenter is surface location above the focus and earthquakes are referred by the geographic location of an epicentre.
3. The two ways by which earthquake is measured are intensity and magnitude.
Intensity is basically a number which is dependent on people’ s observation. It is based on the damage produced by the ground shaking and its failure. It ranges from I to XII.
Magnitude is used to describe the strength of an earthquake. It is based on the maximum amplitude of some seismic waves. It is expressed on a logarithmic scale .
4. Yes, Its people's perception that frequent earthquakes are happening. However, As per records over the time period of 20 years we actually had fewer earthquakes as compared to the long-term world wilde average of 18 major earthquakes and one great earthquake per year.
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