Important Vocabulary Let’s learn some vocabulary before learning about earthquakes! http://iespebilingue.wikispaces.com Extender Spread Daño Damage Liberar Release Riesgo Risk Puntuar Rate Sismógrafo Seismograph Derribar Knock down Placa Plate Sacudir Shake Ola Wave Deslizarse Slide Corteza Crust Chocar contra Bump into Escala Scale Medida Measure Placa tectónica Tectonic plate
Earthquakes happen when the moving tectonic plates that make up the surface of the Earth move apart or bump into each other, or slide under each other. Most often, this just means a little shaking for a few seconds, and nothing very serious happens. http://iespebilingue.wikispaces.com
Several times a year, somewhere in the world there is enough movement to shake the earth a lot, and the earthquake knocks down buildings. When the buildings fall on people, many people can be killed in a few minutes. The strongest earthquakes can break trees in half. http://iespebilingue.wikispaces.com
The Richter scale (or ML scale) rates earthquakes on an exponential scale, so that if an earthquake is rated 1, you can hardly feel it, but an earthquake rated 2 is ten times as strong as an earthquake rated 1, and an earthquake rated 3 is ten times as strong as an earthquake rated 2. http://iespebilingue.wikispaces.com
80% of all earthquakes occur in the circum-Pacific belt.
15% occur in the Mediterranean-Asiatic belt.
5% occur in the interiors of plates and on spreading ridge centers.
How can we reduce damage by earthquakes? http://iespebilingue.wikispaces.com REDUCE DAMAGE PREDICTION Studying the possibility of damage. Using risk maps. PREPAREDNESS Safety measures adopted: Building designs. Population is shown what to do. Police and fire services training.