An earthquake is the shaking of the surface of the earth, resulting from the sudden release of energy in the earths lithosphere that creates seismic waves. Locating an earthquake with seismic data incorporated. Earthquakes happen all over the world along plate edges and along faults most of them occur along the edge of the ocean and continental. Earthquake preparedness and risk reduction duration. Materials for a written report or presentation software, such as powerpoint or hyperstudio. Software to download usgs earthquake hazard program. Shaking of the earth produced by a sudden movement of rock beneath its surface how do earthquakes occur. While the magnitude of such an earthquake cannot be predicted, recent events in california and the pacific northwest have heightened awareness of the need for emergency planning, preparedness and risk management before a major earthquake occurs. Epicenter is the location on the surface directly above the focus faults faults are fractures in earth where. Powerpoint presentation introducing fundamental concepts and observations of earthquake seismology. How does earthquake occur with explanation social science.
An unexpected movement of the earths surface is called an earthquake. The 1976 tangshan earthquake, with death toll estimated to be between 240,000 to 655,000, is believed to be the largest earthquake of the 20th century by death toll. Earthquake mitigation 2 hours at the end of this unit, the participants will be able to. Describe possible consequences of an earthquake at their school. It refers to acquiring fluid or fluidity like properties by small size particles. Knowing precisely where an earthquake occurred is an important piece of scientific information.
Describe the geophysical aspects of the earthquake, such as the faulting mechanism, magnitude, and location of the epicenter. Varying between 0 to 100mm per year, the movement of a plate is driven by convection in the underlying hot and. The political aspects of earthquake preparedness and cleanup. Tectonic plates and plate boundaries earthquakes at a. Powerpoint is the worlds most popular presentation software which can let you create professional earthquakes and volcanoes powerpoint presentation easily and in no time. This fact sheet provides an overview of the sp process to locate an earthquake.
An ebook reader can be a software application for use on a. The worst earthquake disaster in the modern years occurred in north. Seismologists evaluate the hypocenter location and the focal mechanism of an earthquake to decide if the earthquake occurs on a named fault. Each seismic station in the network measures the movement of the ground at that site. This page contains information regarding hazus updates and any previous releases of the software that have resulted in changes, updates, and improvements to hazus. Identify the earthquake hazards in and around their school. Prehospital and disaster medicine latest issue cambridge core. As an earthquake occurs, seismic waves move out in all directions from the. The mae center has developed software over the years to help engineers, risk analysis and decision makers in various endeavours. The estimated total number of injured people would be 661,604.
Maeviz is an advanced tool for seismic loss assessment and risk management. No, but we can have prediction about earthquakes probability but we cant predict them. Unit earthquake source locations are colocated with earthquake locations. This website and its content is subject to our terms and conditions. To understand that earthquakes release seismic waves which can be measured using. The presentation about earthquakes is divided into 2 separate discussions. For powerpoint presentations and other resources from a specific ceetep.
The earths outer shell, the lithosphere, consisting of the crust and uppermost mantle, is divided into a patchwork of large tectonic plates that move slowly relatively to each other. The term liquefaction refers not to water content of the area. This tool operates within the environmental systems research institute esri gis software arcscene 9. Rahul has explained each and every thing in detail and this one is one of the best presentation on earthquake i have came across. Can i get on a list to receive an email message when there is. Jan 25, 2014 this website and its content is subject to our terms and conditions. This paper discusses the use of spectral to ground acceleration ratio to study seismic response of chile region using observed ground motion parameters of 16 september 2015 chile earthquake mw8. The importance of highquality construction in earthquake zones 3. Using this book, readers can explore what gives a speech impact, through language, gesture, vocal variety and rhetorical devices. Earths ground is made up of several very large pieces of land called tectonic plates. The national earthquake technical assistance program netap is designed to help state, local, and tribal governments obtain the knowledge, tools, and support. Earthquake location traveltime graphs from three or more seismographs can be used to find the exact location of an earthquake epicenter. Earthquakes an earthquake is the vibration of earth produced by the rapid release of energy focus and epicenter focus is the point within earth where the earthquake starts.
Most fault surfaces do have such asperities, which leads to. Areas where earthquakes occur the most are highrisk earthquake zones. Elastic rebound earthquake mechanism slippage at the weakest point the focus occurs. Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through earths rocks. Earthquakes most often occur along existing faults whenever the frictional forces on the fault surfaces are overcome. The basics of how earthquakes work and why they occur. Earthquakes terms and concepts ucla epsci 8 flashcards. When the force is large enough, the crust is forced to break. Most earthquakes and volcanoes occur in bands that are often along. Locating an earthquake 4 measuring earthquakes measuring earthquakes historically, scientists have used two different types of measurements to describe the size of an earthquake intensity and magnitude. To prevent catastrophic loss of life, many countries have independently or jointly developed tsunami early warning systems. For example, most of the aftershocks of the 1989 m6. To learn more about earthquakes download the excellent presentation by er.
It can help seismologists identify and map seismic hazards. Tectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along a fault plane. Vibrations earthquakes occur as the deformed rock springs back to its original shape elastic rebound. The largest earthquake that has been measured on a seismograph reached 9. Be earthquake aware and prepared, not scared, a key. An earthquake also known as a quake, tremor or temblor is the shaking of the surface of the earth resulting from a sudden release of energy in the earths lithosphere that creates seismic waves. An earthquake occurs when the earth releases pentup energy and causes the ground to shake. Is water in the soil required for liquefaction to occur. As the plates move they put forces on themselves and each other. It is also a fundamental piece of information necessary for facilitating studies of earths internal structures.
The national earthquake conference occurs every four years and is attended by academia. When the break occurs, the stress is released as energy, which moves through the earth in the form of waves, which we feel and call an earthquake. If the epicenter of a larger earthquake is situated in the offsore seaocean seabed may be displaced sufficiently to cause. An ebook reader can be a software application for use on a computer such as. Introduction to plate tectonics and earthquakes powerpoint presentations. In 1996, the california legislature established the california earthquake authority as a privately financed, publicly managed entity.
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. What is an earthquake and what causes them to happen. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earths crust and cause the shaking that we feel. A presentation of the finding was recently given in vienna. The tectonic plates are always slowly moving, but they get stuck at their edges due to friction. This helps you give your presentation on earthquakes and volcanoes in a conference, a school lecture, a business proposal, in a webinar and business and professional. Introduction to plate tectonics and earthquakes powerpoint. Many online and computerbased software simulators exist that can help students understand earthquakes in a more realworld way. The california earthquake authority is a publicly managed, largely privately funded organization that provides catastrophic residential earthquake insurance and encourages californians to reduce their. If the epicenter of a larger earthquake is situated in the offsore seaocean seabed may be displaced sufficiently to cause tsunami. An earthquake occurs when rocks break and slip along a fault in the earth. Indonesia was hit with a massive earthquake and subsequent tsunami last month, and their warning system failed.
Apr 14, 20 scientists in germany are suggesting that some ants appear to be able to predict an earthquake before it hits. On a map, they plot the earthquake occurrunces and consider how these data. The program requires as input a gis point dataset of earthquake locations containing strike, dip, and rake values for a nodal plane of each earthquake. Eqs during working hours in urban areas are most destructive cause most fatalities injuries. A fault is an area of stress in the earth where broken.
Earthscope and geodesy gps and seismology cascadia. This helps you give your presentation on earthquakes and volcanoes in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. Oct 19, 2018 a major, devastating, oceanwide tsunami occurs roughly every 15 years. At the washington geological survey, active means that a fault has evidence for movement within the holocene time period since about 12,000 years ago. These earthquake training resources are designed to help users obtain the knowledge, tools, and support that they need to plan and implement effective earthquake mitigation strategies. Scientists in germany are suggesting that some ants appear to be able to predict an earthquake before it hits. The usgs earthquake hazards program is part of the national earthquake hazards reduction program nehrp, established by congress in 1977, and the usgs advanced national seismic system anss was established by congress as a nehrp facility. Along with magnitude distance to epicenter, earth materials bedrock vs. Ppt earthquakes powerpoint presentation free to download. When using the powerpoint slides as a learning resource, it is important to read the notes that accompany each slide. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. When the nankai trough earthquake occurs, 187 of the 723 disaster base hospitals dbhs would be located in the areas with a seismic intensity of an upper six on the japanese seismic intensity scale jsis of seven, and 79 dbhs would be located in the tsunami inundation area. Can i get on a list to receive an email message when there. Tectonic plates and plate boundaries earthquakes at a plate.
Explains how energy is stored in rocks rocks bend until the strength of the rock is exceeded rupture occurs and the rocks quickly rebound to an undeformed shape energy is released in waves that radiate outward from the fault. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to propel objects and people into the air, and wreak destruction across entire cities. Effects of ground shaking cause more injuries than any other earthquake hazard. An earthquake is caused by a sudden slip on a fault. Explains how energy is stored in rocks rocks bend until the strength of the rock is exceeded rupture occurs and the rocks quickly rebound to an undeformed shape energy is released in waves that radiate outward from the fault the focus and epicenter of an earthquake the point within earth where faulting begins is the focus, or hypocenter the. Identify the actions that are included in an earthquake safety program. Buildings destroyed by the fire when the gas mains fractured. Nov, 2014 powerpoint is the worlds most popular presentation software which can let you create professional earthquakes and volcanoes powerpoint presentation easily and in no time. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earths crust and cause the shaking that we feel in california there are two plates the pacific plate and the. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq.
The main and the most important feature of this graph is big scattering of the resulted tsunami intensity for earthquake with the same magnitude. The intensity of the earthquake alone does not predict the size of a tsunami or even if a tsunami will occur. The usgs and its partners monitor and report earthquakes, assess earthquake impacts and. Research shows that many earthquakes occur on small, unnamed faults located near wellknown faults. How to make presentations that wow your audience is designed to help anyone deliver a speech that is dynamic, creative and memorable. Earthquakes earthquakes earthquake facts an earthquake is the shaking and trembling that results from sudden movement of the earth s crust. Presentation on earthquake free download as powerpoint presentation. To understand why earthquakes usually happen at plate boundaries. Earthquake also known as quake, tremor or temblor is the phenomenon where there is a sudden release of extreme energy from the earth crust resulting in shaking and displacement of the ground along with the creation of sesmic waves. Do a study on a past earthquake event, such as the 1989 loma prieta earthquake or the 1994 northridge earthquake. When an earthquake occurred, one or more of the eight dragon.
Links to useful documents and information related to a particular release are also provided below. When two parts of the earths surface move suddenly in relation to each other along a fault line, due to tectonic forces, an. Less economically developed country ledc earthquake in kashmir, pakistan lets compare. Pdf disaster management and mitigation for earthquakes. When this happens, it commonly results in earthquakes. May be used either as learning aid for teachers of earth science or edited by earth science teachers for classroom use. Tes global ltd is registered in england company no 02017289 with its registered office. An easy 9step program to get yourself and your neighbors prepared for. It usually also means that there are earthquakes even small ones on the fault. Earthquakes presentation can we predict earthquakes.
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