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Map visualises global earthquake intensity

UK: As the devastating earthquake shook and shocked Japan; Benjamin Hennig, a postgraduate researcher from the University of Sheffield, has produced a new map, World Earthquake Intensity Map. It provides a general representation of the risks of earthquakes on humanity using records from the past 4,000 years.

The map has been created on an equal-population map and allows users to understand the earthquake intensity in relation to today´s population distribution, giving an idea of where most people are at risk in regards to seismic activity.

It provides a visualisation of all major earthquakes that have been complied in the Global Significant Earthquake Database. The database contains information on destructive earthquakes from 2150 BC to the present day that meet at least one of the following criteria: damage of approximately USD 1 million or more, 10 or more deaths, magnitude 7.5 or greater, modified Mercalli intensity X or greater, or the earthquake-generated tsunami.

The map was created using these records by calculating `kernel density´, an equation that shows the probability distribution of earthquakes, in order to visualise the areas most at risk from 2150 BC to the present day.

Source: University of Sheffield