1 / 34

Classifying & Locating Natural Hazards

Classifying & Locating Natural Hazards. Magnitude ( vs ) Intensity. Magnitude An assessment of the size of an event But what characteristic property is measured? Wind speed? Barometric Pressure? Eye diameter? What unit? m/s, km/ h Intensity An assessment of the impact of a disaster

talisa
Download Presentation

Classifying & Locating Natural Hazards

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Classifying & Locating Natural Hazards

  2. Magnitude (vs) Intensity • Magnitude • An assessment of the size of an event • But what characteristic property is measured? • Wind speed? Barometric Pressure? Eye diameter? • What unit? • m/s, km/h • Intensity • An assessment of the impact of a disaster • But what aspects of damage are considered? • Was it observed by people? • Property damage? • Death? • Unitless…a ranking • Category

  3. Hurricanes – Saffir Simpson Scale

  4. Saffir-Simpson Hurricane Intensity Scale

  5. http://www.weather.com/video/hurricane-categories-make-a-difference-38272http://www.weather.com/video/hurricane-categories-make-a-difference-38272 http://www.youtube.com/watch?v=eW3W1on9vjM Hurricane Katrina http://www.youtube.com/watch?v=j-zczJXSxnw Tacoma Bridge

  6. Earthquakes – Moment Magnitude http://allanawheeler.files.wordpress.com/2011/05/mms.jpg

  7. Haiti Earthquake - 2010 Magnitude 7.0

  8. Volcanoes (VEI)Volcanic explosivity index Blast duration (hours) < 1 <1 <1 <6 <12 >12 >12 >12 >12 Blast duration (hours) < 1 <1 <1 <6 <12 >12 >12 >12 >12

  9. http://www.youtube.com/watch?v=xP2dreOI8gI • Mt. St Helens • Plinian

  10. Papadapoulos-Imamura Scale (Tsunami) Not felt Scarcely felt Weak Largely observed Strong Slightly damaging Damaging Heavily damaging Destructive Very destructive Devastating Completely devastating

  11. http://www.youtube.com/watch?v=1J8Feyr38Ss • 2004 Tsunami

  12. Wind Speed km/hr 64 to 116 117 to 180 181 to 252 Fujita Scale Tornadoes 253 to 330 331 to 417 418 to 509 510 to sonic

  13. http://www.youtube.com/watch?v=gieSbj2svwY Fujita Scale

  14. Torino Scale: Impact Risk(NEOs)Near-earth objects – asteroids and comets

  15. Torino Scale: Impact Risk

  16. Current Impact Risks http://neo.jpl.nasa.gov/risks/

  17. Mars Mercury Ida-243 Impact craters are found on any planetary body with a solid surface Moon

  18. Earth’s Known Impact Structures Earth retains the poorest record of impact craters amongst terrestrial planets Plate tectonics - Erosion – Sedimentation - Life Oceans are relatively young and hard to explore Atmosphere Why?

  19. Roter Kamm, Namibia (1.6 mi) Spider, Australia (8.1 mi) Brent, Canada (2.4 mi) Meteor Crater, AZ (0.75 mi) Wabar, Saudi Arabia (0.072 mi) Wolfe Creek, Australia (0.55 mi) Manicouagan, Canada (62 mi) Popigai, Russia (62 mi) Vredefort, South Africa (125-185 mi)

  20. Tunguska Event, Siberia Aerial explosion of a stony asteroid, 25-50 m diameter 7:00 am June 30, 1908 Blue-white fireball wih glowing tail descended Exploded above Tunguska Valley forest 10 Mt of TNT, 10 H-bombs Sound heard over area of 1 million km2 Flattened and burned 2000 km2 Once every 300 years!

  21. Tunguska Event, (Russia) http://www.youtube.com/watch?v=EiXpp-i442s

  22. Odds of dying: Motor vehicle accident 1 in 100 Asteroid impact (optimal chance) 1 in 3000 Flood 1 in 30,000 Tornado 1 in 60,000 Asteroid impact (worse chance) 1 in 250,000

  23. http://www.cnet.com/news/odds-of-dying-from-an-asteroid-strike-1-in-74817414/http://www.cnet.com/news/odds-of-dying-from-an-asteroid-strike-1-in-74817414/

  24. http://news.nationalgeographic.com/news/2014/05/140512-asteroid-impact-winter-science/http://news.nationalgeographic.com/news/2014/05/140512-asteroid-impact-winter-science/

  25. Blizzard A severe winter storm lasting four or more hours. It is characterized by significant wind chill, strong winds and poor visibility due to blowing snow. visibility < 1 km wind speeds of >40 km/h wind chill of -25ºC or colder Duration 4+ hours Environment Canada http://www.mb.ec.gc.ca/air/wintersevere/blizzards.en.html

  26. Blizzards in Canada: • 1 Alberta Clipper • 2 Maritimes Nor’easter • 3 Colorado Low

  27. http://www.theweathernetwork.com/news/articles/remembering-white-juan-10-years-later/21728/http://www.theweathernetwork.com/news/articles/remembering-white-juan-10-years-later/21728/

  28. World Map of Natural Hazards. Earthquake hazard is shown in yellow–brownish colours and has been classified into five grades according to the minimum intensity (Modified Mercalli scale) to be reached or exceeded once in 475 years. Darkest colour means highest hazard. The hazard of tropical windstorms is presented in green colours, again darkest colour corresponds to highest hazard. Classification is according to the five degree Saffir–Simpson scale. Green arrows represent the main cyclone tracks. Other hazards shown are extratropical storms (grey shading) and active volcanoes (small black symbols). Add to CiteULike http://rsta.royalsocietypublishing.org/content/364/1845/2147/F2.large.jpg

  29. In Summary… • Hurricanes – Saffir Simpson Scale • Earthquakes – Moment Magnitude Scale • Volcanoes – VEI index • Tsunamis - Papadapoulos-Imamura Scale • Tornadoes – Fujita Scale • Impacts (NEOs) – Torino Scale • Severe Snowstorms - Blizzards

  30. Play Blizzard!

More Related