Earthquakes are recorded by a "Seismograph“ it draws graphs called “Seismograms” and represents the propagating waves .
The Richter’s scale is a scale that designs a number to earthquakes for quantify the energy released. Total destruction 8 or more Cause serious damages 7.0 – 7.9 Cause several damages 6.1 – 6.9 Causing damage to buildings 5.5 – 6.0 Cause minor damage 3.5 – 5.4 Don’t feel 3.5 or less Efects Magnitude
It was happened 11 th may 2011, Lorca, Murcia (Spain).
It had a magnitude of 5.1 degrees.
The earthquake was also felt in the provinces of Almería, Albacete, Granada, Jaén, Málaga, Alicante, Ciudad Real and places of Madrid. Multiple aftershocks occurred later. The Region of Murcia, is the most active seismic zone of Spain
http://www.youtube.com/watch?v=zvn148YDQmc& feature = related