GLG 112 1st Edition Lecture 17Outline of Last Lecture Earthquake hazardsI. Ground shakingA. What do you do if you are inside?1. Stay inside2. Get under something3. Kitchens4. What about if you are in bed?B. What do you do if you are outside?C. What do you do if you are in your car?II. LiquefactionIII. LandslidesOutline of Current Lecture IV. FloodingA. Why?B. Example V. Fires A. Why do they start?B. Why do they remain burning?C. Example VI. Outbreak DiseasesA. Causes B. ExamplesVII. Tsunamis A. Causes Current LectureFirst of all, let me explain a little bit more about the 1964 Alaskan 9.2 earthquake. In this earthquake a neighborhood (Turnagin Heights) fell off the coast because of a landslide. Later, geologists realized that there was a slight elevation of clay like substance that it was sitting on above the crust. This even was different than most because they decided not to rebuild those houses in the same place just in case it happened again. Instead they made it into Earthquake Park as a reminder. These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Alright, now let’s get into some more earthquake hazards. First off, there is the potential for flooding. Here are a few causes of flooding. - Landslides into a river create dams and upstream flooding- Water mains break- Land surface/elevation change- Dam/levy break causes downstream flooding- TsunamiAn example of earthquake flooding is the Quake Lakes in Sichuan Province, China. They happened because of a 9.2 earthquake on May 12, 2008.Second, fires can be an earthquake hazard. Here are some reasons that they start.- Gas lines break- Electrical lines break- Ovens/stoves/candles can get dropped or moved around- Oil/gas leaks – spread- Lots of fuel/debris- Friction – sparks- Electrical sparks- Matches, lighters, etc (human stupidity)Here are some reasons why they remain burning.- Blocked/destroyed roads- Emergency response disrupted- Lots of fuel is available- Emergency services are overwhelmed- Arsonists- Water mains broken – no water to put them out- Big fire – lots of time/energy so smaller fires don’t get attended toThird, outbreak of diseases can be common after an earthquake. Here are some reasons why.- Contaminated water (if water mains break in large earthquakes)- Lots of people in close quarters (Haiti – cholera)- Lack of sanitation- Sewers break- Cut infections - Hospitals are busy so people with minor injuries don’t go and they become worse- Rodents- Radiation (depending on the area)Example: valley fever outbreak in Los Angeles areaFinally, tsunamis are an earthquake hazard. Here are some causes of tsunamis.- Volcanic eruptions (underwater)- Asteroid impacts- Landslides- Earthquakeso Must be underwatero Must have seafloor vertical movemento Must have a large magnitude*These are all qualities of subduction zone
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