According to the map, a seismic station in which city would be the first to detect seismic waves from an earthquake occurring in Mexico City? [pic] a. Chihuahua b. Houston c. Boulder [pic] d. Acapulco 12. Why does knowledge of Earth's interior come from seismic waves? [pic] a. They change speed and direction when they encounter different materials.
The impacts created from an earthquake can come from the physical factors of the size, the location of the epicentre and the surrounding areas such as a ground type and the lithology of the rocks. However they can also be influenced by human factors such as land use of an area, population density of an area and the use of technology or the equipment a country have that can monitor the event. By this they can prepare or plan for such a disaster. In my essay I shall discuss how the impacts of the earthquake hazards aren’t always human factors and can vary with different events. I shall use examples of the Kobe Earthquake 1995, Boxing Day Tsunami 2004 and the Haiti Earthquake 2010.
After subsidence a depression with steep fault scarp sides i.e. a rift valley is formed. It is trapped in position by later pressure. Theory 2: Compressional forces a) Layers of rocks are subjected to compression forces. b) Faults develop and the outer blocks move upwards.
Studies have been done, from measuring the effects on drinking water to monitoring seismic events related to fracking. While the validity and interpretation of these studies can be brought under scrutiny depending on the viewpoint of the respective group, the mining of the required silica sands and the damages it is ensuing on the environment must be taken into
A seismometer permits seismologists to produce a map of the Planet’s inner surface. Another device that is used to utilize the measures of earthquakes is a Richter magnitude scale. This device provides figure to the quantity of seismic energy released during an earthquake. The Richter magnitude scale was created in 1935 by Charles Richter (www.geo.mtu.edu/UPSeis/intensity.html). Another way to measure the strength of an earthquake is to use the Mercalli scale.
Refraction occurs when waves change speed when changing media. Diffraction occurs when waves bend around a barrier. 81. ANS: At the node, destructive interference takes place. At the crest (antinode), constructive interference takes place.
a. Volcano: include the type of lava, where magma is derived, and why this setting produces hazards b. Earthquake: magnitude and amount of displacement or offset 6. Describe the type of hazards in terms of cause, hazard definition, and location (example-tsunami inundation occurred within 1 mile of coastline in low lying areas). 7. Fatalities 8. Damage: 2-3 specific examples of structural damage (earthquakes); areas covered with volcanic debris (volcanic eruption); any other types of damage 9.
Discuss the Extent to which Tectonic hazards can be Monitored 40 marks Monitoring tectonic hazards involves being able to predict when they will occur and the extent of the damage they may cause and in this way we can prevent maximum harm taking place. When predicting volcanoes it’s important to look at their history of previous eruptions and the type of volcano. The most recent research was in time prediction using shock waves that are produces as magma reaches the surface which expands cracks or breaks the surface of the volcanic rock. This was partly successful in a Mexican eruption in 2002 of Popacatapelt. Using the history of eruptions allows us to assess what is likely to happen in the future, for example, in the eruption of Mt.
8. How does hornfels form? Rock contacts with magma and bakes rock. 9. Know that the type of metamorphic rock relates to how much heat and pressure the rock was exposed to.
Earthquakes Sheila Fangmeier GEO101 – Earth Science Colorado State University – Global Campus Karen Stelly October 5, 2014 Earthquakes “An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves” (Earthquake, 2014). Seisometers measure earthquake magnitude and intensity based on two scales, the Richter and Mercalli. An earthquake’s magnitude can range from less than 2.0 to greater than 9.0 on the Richter scale and its intensity I to greater than VIII on Mercalli (Richter magnitude scale, 2014). The depth focus is important to how much damage can occur on the Earth’s surface. An earthquake’s depth can be considered shallow (less than 70km), intermediate (between 70km and 300km), or deep (300km to 700km) (Earthquake, 2014).