I’ve released a new version of my time lapse video showing aftershocks following the catastrophic Japanese earthquake and tsunami. The new animation covers a couple of days, and several hundred events recorded by the United States Geological Survey since the 8.9 magnitude quake
Astonishingly, the number of aftershocks from just this one quake amount to about 90% of the total logged worldwide by the USGS since March 11. Fifteen have been at 6.3 magnitude or above – the strength of the recent Christchurch earthquake.
In addition to the longer time span, I made a couple of changes to the visualization from the previous version: The video includes a running total top right and magnitude values over-layed on each aftershock.