'Like thunder in the ground': Texans fear link between quakes and fracking waste

Wastewater injection, a byproduct of fracking, is the likely culprit behind a surge of earthquakes in northern Texas - and residents want accountability

An earthquake, Cathy Wallace says, feels like "a rumble - it's like thunder in the ground coming towards your house like a train and you can hear it and feel it coming".

Wallace is not based in California, or in any of the US's well-known seismic hot-spots. She lives in north Texas, historically one of the country's least earthquake-prone regions - until the drillers came.