Mysterious booms, bangs and shudders have been reported on Unknown Country for years, and they continue to be a phenomenon that we monitor with a keen interest.

The unexplained noises have been heard all across the globe, including Canada, Brazil, Ukraine, Spain, South America, Russia, many areas of the United States and across the United Kingdom. Now it seems as though the booms have traveled "down under" as a series of strange "explosions" have been heard across west and north Auckland, in New Zealand.
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A recent study suggests that killer whales and other marine mammals are far more likely to pick up sonar signals than was previously thought.

Scientists have discovered that commercially available sonar systems, which are designed to create signals beyond the range of hearing of such animals, do in fact emit signals known to be within their hearing range.

The sound is likely very soft and audible only when the animals are within a few hundred meters of the source, say the authors of a new study. The signals would not cause any actual tissue damage, but it’s possible that they affect the behavior of some marine mammals, which rely heavily on sound to communicate, navigate, and find food.
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The Canadian government will fund a search for the cause of the mysterious Windsor hum, a low, persistent noise that’s been bothering there residents for two years. It’s been described as described as sounding like an idling truck or train engine. Canada suspects that it may originate at car manufacturing plants across the river, in Detroit–hence the "international" aspect.

A study made last year by the government suggested that the hum may originate in the general area of Zug Island in River Rouge, Michigan, where there is a lot of steel production and manufacturing, however the mayor of River Rouge says his city doesn’t have the money to investigate.
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There has been a surprising outburst of booming sounds in many US communities lately.

In Columbia County, Georgia, some people said they were so loud that they woke them up at night. On ABC News, Michael Miller quotes Pam Tucker, director of the Columbia County Emergency Management Agency as saying it’s been loud booms and rumbling, and "now we’re hearing about pictures being moved on walls.
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