PPT-The Lomo Prieta earthquake, also known as The Quake of ’89’ and ‘The World

S eries E arthquake 1989 San Francisco Earthquake The Epicentre The epicentre of the quake was in the Forest of Nisene Marks States Park in Santa Cruz County The San Francisco Earthquake occurred on October 17. Are You Prepared To Ride It Out? We have heard it so many times –the “big one” is coming. In our lifetime, we still haven’t seen or felt that huge earthquake. That shouldn’t stop us from preparing. Andrei Gabrielov. Purdue University. West Lafayette, IN, USA. www.math.purdue.edu/~agabriel. San Francisco, April 18, 1906. Plate Tectonics. Major tectonic plates and world seismicity. Plate Tectonics. Lesson objective: To be able to explain the characteristics and spatial distribution of earthquakes . Key terminology . Focus . Epicentre. Asthenosphere . Lithosphere . P and S waves . Surface waves . main idea. of the text?. It was 1492. Vasco da Gama and his crew had left Portugal months earlier. Now they were sailing down the coast of South America and around the southern tip. The ship was in fine shape. There was plenty of dried meat and biscuits to feed the crew, but the sailors had developed a strange sickness. Their gums bled. Their teeth fell out. Their muscles ached. Their bones broke easily, and their bodies were covered with bruises. Eventually, 100 of the 160 sailors died from this disease.. By: Conrad Ricks, Liz Anderson, Melissa Prater & Michelle Carleton. Source: http://www.bbc.co.uk/programmes/b011vg9w. Source: http://cempaka-nature.blogspot.com/2009/12/indonesias-next-big-quake-due-under.html. Active Fault. Earthquakes Create Seismic Waves. (also hypocenter). 3 Types of Seismic Waves. P wave: Primary. S wave: Secondary. Surface waves. Fastest. Slowest. Depiction of Seismic Waves. Types of Earthquake Waves. . T. sunami . eqs. ETS/slow slip. Source Time Function Calculation . currently finishing STF determination for Alaska/Kuriles/Sumatra/Java. reconciling STF indicated depths with revised EHB catalog. That was the year* that Lisbon town. Saw the earth opened up and gulp her down.. . (*1755). - Oliver Wendell Holmes. (The Deacon’s Masterpiece). Earthquakes . Webpage for course (daytime). Seismic Shock. Nine people were killed by the May 1940 Imperial Valley earthquake. At Imperial, 80 percent of the buildings were damaged to some degree. In the business district of Brawley, all structures were damaged, and about 50 percent had to be condemned. The shock caused 40 miles of surface faulting on the Imperial Fault, part of the San Andreas system in southern California. Total damage has been estimated at about $6 million. The magnitude was 7.1.. Why you need to prepare for the next earthquake . Alaska has more earthquakes than any other region of the U.S. . And in fact is one of the most seismically active area of the world.. Great earthquakes (Earthquakes larger than magnitude 8) rock the state on average every 13 years since the 1900. . earthquake. (also known as a . quake. , . tremor. or . temblor. ) is the result of a sudden release of energy in the . Earth's. . crust. that creates . seismic waves. . . The . seismicity. , . seismism. ". Strong Shaking Case Studies" . areas to . search first for earthquake survivors and casualties. . Which . area . (N1, N2, E1, or E2) should . get priority? Why?. 2. Structural Damage, 1989 Loma . Prieta. An earthquake is a motion of the ground surface.. According to A.N. . Strahler. and A.H. . Strahler. ,(1976), ‘An earthquake is a vibration or oscillation of the surface of the earth caused by a transient disturbance of the elastic or gravitational equilibrium of the rocks at or beneath the earth the surface’.. Amount and duration are related to the amount of energy released. Which hazards do you know?. Earthquake Hazards. Tsunami: displacement of a large volume of water. Shallow hypocenter, large volume of displaced crust, large earthquake.