A mysterious wave of seismic waves traveled thousands of miles around the globe, firing sensors across Africa, Canada, New Zealand and Hawaii, apparently without being felt by a single person.
- The seismic waves that began on the Mozambique coast provoked sensors in Kenya, Chile, New Zealand and Canada
- Tremors lasted more than 20 minutes
- The earthquake went unnoticed until it was picked up by an earthquake enthusiast online
The tremors began along the edges of Mayotte, a French archipelago in the Indian Ocean between Madagascar and Africa, and would have flown under the radar, if not for earthquake enthusiasm in New Zealand that had been attentive to the actual project of the United States Geological Survey , time seismogram online.
They posted images of the readings on Twitter, leading researchers around the world to try to deduce from where these bizarre came from.
Unlike traditional earthquakes, which cause a jolt of several high-frequency waves, readings of the Mayotte tremor collected consistent low-frequency waves that lasted more than 20 minutes. It was as if the planet sounded like a bell.
Online theorists suggest covert nuclear tests, sea monsters or a meteorite as the cause of tremor, but Goran Ekstrom, a seismologist at Columbia University, told National Geographic that the explanation was likely.
"I do not think he has seen anything like that [but] that does not mean that, in the end, the cause of them is that exotic, "he said.
Professor Ekstrom suggests that the seismic event really began with an earthquake. He thinks it happened surreptitiously because it was a slow earthquake.
Slow earthquakes are more silent than traditional earthquakes because they come from a gradual release of stress that can spread over a significant period of time.
"The same deformation happens, but it does not happen like a jolt," said Professor Ekstrom.
Since May this year, Mayotte has been subjected to what is known as "earthquake swarm"; A group of hundreds of seismic events during a period of days or weeks, but the activity has been significantly reduced in recent months.
The seismic readings managed to capture the "ghost" earthquake & # 39; on a chart. (Anthony Lomax via Twitter)
The analysis of the French Geological Survey suggests that strange waves may indicate a massive movement of magma under the earth's crust, such as the collapse of a camera.
The rhythmic movement, such as fade rock slippage, or a pressure wave rejection through the body of the mma have the potential to resonate in a similar way to the readings of Mayotte.
The Democratic Republic of the Congo was the site of a similar event in 2002, where a similar slow earthquake and low frequency waves were linked to a magma chamber collapsing beneath the Nyiragongo volcano.
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