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Earthquakes Jeremy Geller 4S March 27,2013 What is an Earthquake? Are you ready to learn about earthquakes? If your answer is yes then here we go! An earthquake is something that shakes the earth. There are over three million a year! Most earthquakes happen in California. A magnitude is how strong the earthquake was. The magnitude goes up to 10.0. The strongest magnitude an earthquake ever was, was 9.2. I hoped that you learned something! How do Earthquakes form? Do you want to hear how an earthquake forms? Well if you do than your in the right place! In order for an earthquake to happen, two tectonic plates have to rub against each other. If an earthquake forms in the water than a tsunami happens. The focus is directly under the earthquake where it forms. The epicenter is directly above the focus on the earths surface. I hope that you enjoyed reading about how an earthquake forms. Types of Earthquakes Are you ready to hear about the types of earthquakes? Well if you are then here we go! There are three types of plate boundaries: mid ocean, spreading ridges, subduction zones, and transform faults. Mid ocean ridges move apart. Subduction zones are plates that collide. Divergent plates are mostly on the ocean where it is wet. Convergent plate boundaries are being destroyed. Next I will tell you how earthquakes form. How long can an Earthquake last? 1 0 0 1s t E W N Are you ready to hear how long an earthquake can last? Well if you are, then you’re in luck. Earthquakes can last 20 seconds to a minute. Normally earthquakes last less than a minute. Sometimes it can last a minute to a minute and a half. The longest earthquake was two minutes. Sources w.letusfindout.com Usgs wikipedia