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"Tsunami warning center scientists usually measure an earthquake's "size" with the moment magnitude scale rather than the older but more famous Richter magnitude scale. The moment magnitude scale is better suited for measuring the "sizes" of very large earthquakes and its values are proportional to an earthquake's total energy release, making this measurement more useful for tsunami forecasting. Moment magnitude numbers scale such that that energy release increases by a factor of about 32 for each whole magnitude number. For example, magnitude 6 releases about 32 times as much energy as magnitude 5, magnitude 7 about 32 times as much as magnitude 6, and so on. This animation graphically compares the relative "sizes" of some 20th and 21st century earthquakes by their moment magnitudes (according to USGS/NEIC). Each circle's area represents its relative energy release, its color indicates its tsunami potential (see http://ptwc.weather.gov/ptwc/about_me...), and its label lists its moment magnitude, its location, and the year it happened. ----- Los científicos del centro de alertas de tsunamis miden el "tamaño" de un terremoto utilizando la escala de magnitud de momento y no otras escalas más antiguas y famosas como la escala de magnitud de Richter. La escala de magnitud de momento es más adecuada para medir el tamaño de grandes terremotos, y sus valores son proporcionales a la cantidad de energía liberada, lo cual hace esta medida de magnitud más útil para el pronóstico de tsunamis. Los números en la escala de magnitud de momento escalan de manera que la cantidad de energía liberada se incrementa 32 veces por cada número entero de diferencia. Por ejemplo, un evento con magnitud 6.0 libera cerca de 32 veces más energía que uno de 5.0, y uno de magnitud 7.0 libera 32 veces más energía que uno con magnitud 6.0, etcétera. Esta animación compara gráficamente el tamaño relativo de algunos terremotos ocurridos durante los siglos XX y XXI en término

"Following the earthquake in Haiti in 2010, the UN and other humanitarian organisations scrambled to provide sufficient housing for 1.5 million Haitians. At the end of 2013, around 150,000 people were still living in temporary structures and makeshift tents. Progress to rebuild the country has been slow."

"Monsoon rains are piling on misery in the worst-hit areas, as UN warns that rising food insecurity shows need to prepare for future disasters and build resilience"