An 8.9-magnitude earthquake struck 400km off the coast of Japan on Friday, triggering a devastating tsunami. Dozens of aftershocks, were felt after the quake.
I’ve used seismic information from the United States Geological Survey (USGS) to create a time lapse video showing every subsequent aftershock above magnitude 4.5, over the next 12 hours.
Starting with the magnitude 8.9 earthquake the events are plotted onto a map in sequence. The larger the circle the stronger in magnitude the aftershock. The time, in UTC/GMT, is displayed in the bottom right hand corner. The dots left behind represent the epicentre of each event:
On a similar theme the National Oceanic and Atmospheric Administration (NOAA) has published a video showing the propagation of the tsunami across the Pacific: