Geology Volcanoes&Earthquake Assignment21 - Assignment Example

Because of this, the P-wave shadow zone occurs and seismometers do not record the initial waves. 9. Magnitude refers to the measurement of the energy that an earthquake releases and it may be given through Ritcher scale. The lowest scale is 2.5 or less, which is normally not felt, but is recorded by a seismograph. Scale of 2.5 to 5.4 means minor damage and can be felt most of the time. Scale of 5.5 to 6.0 will cause damage to structures while scale of 6.1 to 6.9 will cause damage in an area with heavy population.

Major earthquakes record scales of 7.0 to 7.9 while a magnitude of 8.0 or higher can destroy an entire community located near the epicenter. 10. The intensity of an earthquake means a measure of the earthquake’s power of shaking. The intensity is measured by the Mercalli scale that represents the damage or effect that the earthquake causes. Intensity can range from I to XII given in Roman numerals. 11. Intensity of an earthquake varies for various reasons. It decreases with distance of the earthquake.

Intensity also depends on the shape of the building, foundation, or mode of construction. Intensity also varies depending on the near surface or regional geologic conditions. 20. Vertical evacuation refers to a method of evacuation preferred for helping people out of the area affected by an earthquake or Tsunami. It involves structures that resemble artificial hills such as a ramp or a lighthouse. A vertical evacuation used in the case of a Tsunami allows the waves to pass through the lighthouse or ramp while victims seek refuge in top floors. 21. Things that ought to be in an emergency supply kit subsume a flashlight, food, water, weather radio, spare batteries, first aid kit, medical items and seven-day supply of medications, personal hygiene items, multi-purpose tool, hygiene and sanitation items, cell phone with charging system, contact information, emergency