How effective are earthquake early warning systems?

Earthquake early warning detection is more effective for minor quakes than major ones. This is according to a new study from the United States Geological Survey. Seismologists modelled ground shaking along California’s San Andreas Fault, where an earthquake of magnitude 6.5 or more is expected within 30 years. They found that warning time could be increased for
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More than 100 Nigerian schoolgirls, most of those recently kidnapped by Boko Haram, have gone home to their families, four days after being freed. The jihadist group abducted the girls from the town of Dapchi in February. After their release from captivity and a brief emotional meeting with their parents, the schoolgirls were flown to
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At least 37 people are confirmed to have died in a fire that tore through a shopping centre in the Siberian coal-mining city of Kemerovo. At least 64 people are missing, including 41 children, and parts of the building are in danger of collapse. The blaze started on an upper floor of the Winter Cherry
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Europe’s most active volcano, Mount Etna, is sliding towards the sea. Scientists have established that the whole edifice on the Italian island of Sicily is edging in the direction of the Mediterranean at a rate of 14mm per year. The UK-led team says the situation will need careful monitoring because it may lead to increased
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Facebook ended the week $58bn lower in value after its handling of a historic data breach. Its founder Mark Zuckerberg apologised for data breaches that affected 50 million users. The apology did not stop investors from selling shares in Facebook, with many wondering just how bad the damage will be for the social network. The
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Thousands of people from around the world have signed condolence books in the wake of the death of renowned theoretical physicist Stephen Hawking. Prof Hawking, who had motor neurone disease, died on 14 March, aged 76, at his home in Cambridge. Condolence books at Gonville & Caius College have been signed by more than 2,780 people,
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Tests on a six-inch-long mummified skeleton from Chile confirm that it represents the remains of a newborn with multiple mutations in key genes. Despite being the size of a foetus, initial tests had suggested the bones were of a child aged six to eight. These highly unusual features prompted wild speculation about its origin. Now,
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Two lorry drivers have been jailed over a crash on the M1 in Buckinghamshire that killed eight people last year. Ryszard Masierak, 31, was jailed for 14 years after being found guilty of causing death by dangerous driving. David Wagstaff, 54, was sentenced to 40 months in prison after pleading guilty to causing death by
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The United States has imposed sanctions on an Iranian company and 10 individuals for alleged cyber attacks, including on hundreds of universities. The Mabna Institute is accused of stealing 31 terabytes of “valuable intellectual property and data”. The justice department said the firm hacked 320 universities around the world, dozens of companies and parts of
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Armed police have killed a suspect who shot dead three people in a series of attacks in southern France. The gunman hijacked a car and then took hostages at a supermarket in the town of Trèbes. The man, named by ministers as 26-year-old Redouane Lakdim, pledged allegiance to the Islamic State group. He is believed
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