US government geologists have reported that the number of earthquakes in the central United States rose "spectacularly" near where oil and gas drillers fracked.
The average number of earthquakes of magnitude 3 or greater in the US mid-continent - an area that includes Arkansas, Colorado, Oklahoma, New Mexico and Texas - increased to six times the 20th century average last year, scientists at the US Geological Survey said in an abstract of their research.
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Scotland will see a mixture of sunshine and showers today, with some showers turning wintry in places.
Two men seen as alternative voices to the US political establishment have won decisive victories in the New Hampshire presidential primary.
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