Any plane that flies past the speed of sound creates a sonic boom, which often results in a major noise disturbance over close-by areas.

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In August 2008, a 16-year-old boy - who could not be named for legal reasons - was jailed for four years at Glasgow Sheriff Court over his role in disturbance.

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Three Aberdeen fans have been sentenced over a large-scale disturbance with Rangers fans in Glasgow last January.

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Atrial fibrillation is the most common heart rhythm disturbance, with over half a million sufferers in the UK. It increases the risk of a person having a stroke by five times and doubles the risk of death.

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Studies funded by national laboratories have estimated that a powerful solar disturbance could knock out electrical service to over a hundred million people, causing trillions of dollars in damage.

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This year, only a minor disturbance is expected: a Wednesday demonstration by phone-company workers over a local grievance.

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