Characteristics of Earthquakes 0.0 / 5 ? GeographyTectonicsIGCSEAQA Created by: Lotto65Created on: 22-12-15 14:05 What is the focus of an earthquake? The point where the earthquake begins 1 of 21 Where is the focus of an earthquake? In the crust 2 of 21 Deep focus earthquakes cause less/more damage Less 3 of 21 Deep focus earthquakes are felt less/more Less 4 of 21 Shallow focus earthquakes cause less/more damage and are felt less/more More for both 5 of 21 What is the epicentre of an earthquake? The point on the Earth's surface directly above the focus 6 of 21 What are shock waves? Seismic waves generated by an earthquake that pass through the crust 7 of 21 What is another name for shock waves? Seismic waves 8 of 21 What is a seismogram? The line produced by a seismograph which records earthquake activity 9 of 21 What does the richter scale measure? The strength of earthquakes 10 of 21 What does the mercalli scale measure? The effects/ damage an earthquake has done 11 of 21 Roughly what is the strength of an earthquake with 3 on the richter scale in comparison to 1? 100 times stronger 12 of 21 How much stronger is an earthquake of 2 on the richter scale to an earthquake of 1? 10 times 13 of 21 Is there an upper limit to the richter scale? No 14 of 21 What is the scale of the mercalli scale? I to XII 15 of 21 On what plate margins do earthquakes occur? Conservative, constructive and destructive 16 of 21 Why do earthquakes occur at destructive margins? Pressure from subducting plate and it melting 17 of 21 Why do earthquakes occur at constructive margins? Friction and pressure by plates moving apart 18 of 21 Are earthquakes at constructive margins more/less severe than those at destructive and conservative? Less 19 of 21 Why are there earthquakes at conservative margins? When plates stick, pressure and stresses build up and this sudden release of built up pressure causes earthquakes as plates release 20 of 21 Are earthquakes at conservative margins powerful? Yes 21 of 21
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