New research uses a different technique to give a much lower estimate.
A researcher looking at the social impacts of shale gas developments, explains why there's much more to the Blackpool tremors than just ground movements.
Although fracking has been given the green light it's still not known how common felt earthquakes may become and if communities are willing to accept them
Big oil and gas companies spent far more fighting this ballot initiative than the measure's supporters did.
Landowners told researchers that they lacked the knowledge, time and money to advocate for themselves, their financial interests and their property in negotiations over drilling leases.
Governments and energy firms will find it hard to generate the necessary public acceptance for such a controversial technology.
Shale gas exploitation in the US has helped cut is greenhouse gas emissions by 11%. A study explores what would happen if this were expanded globally, and the findings challenge conventional wisdom.
It is extremely important to monitor local seismic activity before fracking starts to avoid causing harm.
A vulnerability map could help assess the risks associated with fracking and groundwater which around 300 towns depend on in South Africa's Karoo.
South Africa's Karoo region potentially holds shale gas that could transform the energy economy of the country. But given the uncertainties around exploration what's the next logical step?
Why protesters should think about putting their feet up.
South Africa has been considering shale gas development in the Karoo region. The gas, will be expensive to explore and extract, will be used as part of the country's energy mix.
Gas buried in the Northern Territory's Velkerri Shale was produced in a "slime world" that existed nearly a billion years before the first complex life on Earth evolved.
Shale gas holds considerable advantages. But there are still a number of uncertainties around whether South Africa is ready for such a bold step.
Research shows people don't trust planning decisions if it seems central government or energy companies have had too much influence.
The government promises cash for communities that accept fracking, but cannot know whether it can keep that promise or not.
Councillors are caught in the crossfire between government, industry, protestors and locals.
Woodside's deferral of its floating gas project in Western Australia is just the latest blow low oil prices have dealt the industry.
There's a bunfight about whether local or national government should call the shots when it comes to fracking.
UK's decision to close coal power plants is really a statement of the obvious, and does nothing to answer the problem of what to do afterwards.