A new animated map has revealed the startling growth of earthquakes in Oklahoma over the last few years.
Illustrated as purple splotches on the map, the number of earthquakes can be seen dramatically increasing over the course of the minute-long video, which accounts for a period spanning 2004-2016.
Not only have they become more frequent, but the map shows how they are also getting bigger – and, experts say wastewater injection is to blame.
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Illustrated as purple splotches on the map, the number of earthquakes can be seen dramatically increasing over the course of the minute-long video, which accounts for a period spanning 2004-2016
In the map, the size and volume of the dots correlate to the earthquake strength.
At first, beginning in 2004, these dots are small and sporadic.
Over the course of the next few years, however, they become far more frequent, and much larger.
Roughly halfway through the animation, the quakes begin to spike dramatically until the dots appear to take over nearly the entire state.
This reveals the startling increase in induced seismicity over the last few years, which has been linked to wastewater injection.
The map, shared on Twitter by USGS in Oklahoma, shows how the state’s induced seismicity has risen in roughly the last decade.
‘Animation of equakes in Okla. & parts of adjoining states, 2004-16,’ USGS in Okahoma tweeted alongside the map.
‘Size of dots and volumes are proportional to equake strengths.’
While many have claimed fracking is to blame for the phenomenon, this largely is not the case, according to the experts.
Instead, wastewater disposal is more often driving these earthquakes.