Sequence of events in an Earthquake
... Days or weeks may occur before a major earthquake or earthquakes occur. There are often many little shocks, or tremors, that occur called foreshocks. They are the result of pressure building the tectonic plates. ...
... Days or weeks may occur before a major earthquake or earthquakes occur. There are often many little shocks, or tremors, that occur called foreshocks. They are the result of pressure building the tectonic plates. ...
Magnitude 6.2, CENTRAL ITALY Wednesday, 24 th August, 2016 at
... primarily because of the northward motion of the African plate, causing the closure of the Tethys Ocean, and subduction of the Tethys plate. The convergence rate varies from 4 to 10 mm/yr along the boundary. The Apennine mountains of Southern Italy have a high risk of earthquakes due to the Subducti ...
... primarily because of the northward motion of the African plate, causing the closure of the Tethys Ocean, and subduction of the Tethys plate. The convergence rate varies from 4 to 10 mm/yr along the boundary. The Apennine mountains of Southern Italy have a high risk of earthquakes due to the Subducti ...
Magnitude 2.7 GLENLYON, PERTH/KINROSS, UK Tuesday, 27
... A magnitude 2.7 earthquake occurred in the central Scotland on 27 August 2013. Its epicentre was approximately 36 km ESE of Kinlocheven, Higland and 40 km WSE of Pitlochry, Perth/Kinross. The earthquake occurred at a depth of 2 km (1 mile). We measure around 20 earthquakes of this size every year in ...
... A magnitude 2.7 earthquake occurred in the central Scotland on 27 August 2013. Its epicentre was approximately 36 km ESE of Kinlocheven, Higland and 40 km WSE of Pitlochry, Perth/Kinross. The earthquake occurred at a depth of 2 km (1 mile). We measure around 20 earthquakes of this size every year in ...
Earthquakes
... • Fault: a fracture in a rock formation where movements occurs • Sudden release causes a quake ...
... • Fault: a fracture in a rock formation where movements occurs • Sudden release causes a quake ...
Wearing Down Earth`s Surface
... • Remember that tectonic plates move very_______________. Sometimes rocks move along easily with the plates, but they can also jam up against a plate or between two_______________. Over time, stress builds up within the rock at the plates_______________ against each other. ...
... • Remember that tectonic plates move very_______________. Sometimes rocks move along easily with the plates, but they can also jam up against a plate or between two_______________. Over time, stress builds up within the rock at the plates_______________ against each other. ...
Background Information
... Tehachapi earthquake, the Loma Prieta Earthquake of 1989 and the Northridge earthquake of 1994 are well known major seismic events in the history of California. Few people realize that the earth is constantly moving and changing from hundreds of daily micro-quakes along the various fault systems tha ...
... Tehachapi earthquake, the Loma Prieta Earthquake of 1989 and the Northridge earthquake of 1994 are well known major seismic events in the history of California. Few people realize that the earth is constantly moving and changing from hundreds of daily micro-quakes along the various fault systems tha ...
British Columbia Earthquake Fact Sheet
... earth's crust. The surface of the earth is always changing, as the earth's crust is made up of "plates" (like pieces of a jigsaw puzzle) that are constantly moving relative to one another at speed's of about 2-10 cm/year (about how fast your fingernails grow). The plates can either slide past one an ...
... earth's crust. The surface of the earth is always changing, as the earth's crust is made up of "plates" (like pieces of a jigsaw puzzle) that are constantly moving relative to one another at speed's of about 2-10 cm/year (about how fast your fingernails grow). The plates can either slide past one an ...
earthquakes - SchoolRack
... theory that rocks that are strained past a certain point will fracture and spring back to their original shape ...
... theory that rocks that are strained past a certain point will fracture and spring back to their original shape ...
Types of Faults
... • Most faults are along tectonic plate boundaries – Most earthquakes occur here ...
... • Most faults are along tectonic plate boundaries – Most earthquakes occur here ...
Continental Drift and Plate Tectonics
... where plates are ________________ _____________and new crust is created by ___________pushing up from the mantle. The best known of the divergent boundaries is the Mid-Atlantic Ridge. This submerged mountain range, which extends from the Arctic Ocean to beyond the southern tip of Africa, is but one ...
... where plates are ________________ _____________and new crust is created by ___________pushing up from the mantle. The best known of the divergent boundaries is the Mid-Atlantic Ridge. This submerged mountain range, which extends from the Arctic Ocean to beyond the southern tip of Africa, is but one ...
Plate tectonics/volcanoes
... 16. Compare and contrast convergent and divergent plate boundaries. Give an example of each. 17. At a mid ocean ridge, where are the youngest rocks found? The oldest? 18. What does seafloor spreading cause? 19. Where do most earthquakes and volcanoes occur? Why? 20. Explain how volcanic island arcs ...
... 16. Compare and contrast convergent and divergent plate boundaries. Give an example of each. 17. At a mid ocean ridge, where are the youngest rocks found? The oldest? 18. What does seafloor spreading cause? 19. Where do most earthquakes and volcanoes occur? Why? 20. Explain how volcanic island arcs ...
Inside the Restless Earth
... 12. For each of the boundaries diagramed above, explain what happens at each of these boundaries and give a real-world example of each one. ...
... 12. For each of the boundaries diagramed above, explain what happens at each of these boundaries and give a real-world example of each one. ...
DECivil - Departamento de Engenharia Civil, Arquitectura e
... important than average (hospitals, scools, government buildings, lifeline facilities) and others are less important (for ...
... important than average (hospitals, scools, government buildings, lifeline facilities) and others are less important (for ...
this and open it
... o How can plate tectonics explain the formation of volcanoes, mountains, islands, trenches, and ridges? o What is the relevance of plate tectonics in earthquakes? ...
... o How can plate tectonics explain the formation of volcanoes, mountains, islands, trenches, and ridges? o What is the relevance of plate tectonics in earthquakes? ...
Document
... travel along the surface of the earth, not down into it. They usually create the most damage because they are nearer to the surface. ...
... travel along the surface of the earth, not down into it. They usually create the most damage because they are nearer to the surface. ...
Why do earthquakes and volcanoes occur in certain places?
... These plates are moved by the currents in the hot rocks below the surface. The edges of plates are called margins or boundaries. ...
... These plates are moved by the currents in the hot rocks below the surface. The edges of plates are called margins or boundaries. ...
Dynamic Earth Unit 4 Study Guide Ans. key
... How many times stronger is the ground motion for each unit increased on the Richter scale? a. The ground motion is 10 times stronger for each unit increased on the Richter scale. For example, an earthquake with a magnitude of 5.0 on the Richter scale produces 10 times as much ground motion as an ear ...
... How many times stronger is the ground motion for each unit increased on the Richter scale? a. The ground motion is 10 times stronger for each unit increased on the Richter scale. For example, an earthquake with a magnitude of 5.0 on the Richter scale produces 10 times as much ground motion as an ear ...
Review for Earthquakes Test
... 5. Know how to find the distance of a location from the epicenter of the earthquake. (You WILL have to do this on the test.) Lesson 13 – Plotting Earthquakes 1. What does magnitude measure? _________________________________________________________________ 2. What scale is traditionally used to measu ...
... 5. Know how to find the distance of a location from the epicenter of the earthquake. (You WILL have to do this on the test.) Lesson 13 – Plotting Earthquakes 1. What does magnitude measure? _________________________________________________________________ 2. What scale is traditionally used to measu ...
DECivil - Departamento de Engenharia Civil, Arquitectura e
... There are 12 degrees. Up to degree IX the intensity is defined as a function of: a) How the earthquake is felt by people b) Effects on soil and objects c) Damage on constructions Degrees X, XI and XII are characterized only as a function of damage on the constructions. In order to charaterized damag ...
... There are 12 degrees. Up to degree IX the intensity is defined as a function of: a) How the earthquake is felt by people b) Effects on soil and objects c) Damage on constructions Degrees X, XI and XII are characterized only as a function of damage on the constructions. In order to charaterized damag ...
Seismic Wave
... Seismic Waves - Waves of vibration that occur during an earthquake. They spread out in all directions from the earthquake focus. 1. Focus - Point inside the Earth where the earthquake originates. 2. Epicenter - Point on the surface directly above the focus. There are 2 main types of waves. There are ...
... Seismic Waves - Waves of vibration that occur during an earthquake. They spread out in all directions from the earthquake focus. 1. Focus - Point inside the Earth where the earthquake originates. 2. Epicenter - Point on the surface directly above the focus. There are 2 main types of waves. There are ...
Chapter 5 Fast Changes on Earth
... 1. A cuplike shape called a __A__ forms around the vent of a volcano. 2. Movements in Earth’s crust caused by a sudden shift in Earth’s plates are __B__. 3. __C__ are areas where rocks slide past one another along cracks in the Earth’s plates. 4. When land becomes so full of water that it may change ...
... 1. A cuplike shape called a __A__ forms around the vent of a volcano. 2. Movements in Earth’s crust caused by a sudden shift in Earth’s plates are __B__. 3. __C__ are areas where rocks slide past one another along cracks in the Earth’s plates. 4. When land becomes so full of water that it may change ...
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the perceptible shaking of the surface of the Earth, which can be violent enough to destroy major buildings and kill thousands of people. The severity of the shaking can range from barely felt to violent enough to toss people around. Earthquakes have destroyed whole cities. They result from the sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter magnitude scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2014), and it was the largest Japanese earthquake since records began. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.