3 days agoScientists are surprised: The whole planet shook in 20 minutes, but nobody felt anything.
Periskopi(8 years ago)
(8 years ago)On November 11, the entire planet was rocked about 20 minutes, but no human felt anything. And although scientists are aware that it happened, they have no idea what it could be. The seismic event began at around 10:30, 25 miles [24 km] from Mayotte, the French island located near Madagascar, on the southeastern coast of [...]
On November 11, the entire planet was rocked about 20 minutes, but no human felt anything. And although scientists are aware that it happened, they have no idea what it could be. The seismic event began at around 10:30, 25 miles [24 km] from Mayotte, the French island located near Madagascar, on the southeastern coast of Africa.
Seismic waves traveled as far as Chile, New Zealand, and Canada as far as the United States of America, the state of Hawaii.
Speaking of National Geographic, Göran Extöm, seismologist at Columbia University said: “I don't believe we've ever seen anything like this before. This does not mean that something good is behind it”.
Normal earthquakes are short - lived. They produce sudden shocks and usually last for seconds. This is followed by other longer - lasting movements.
Seismic swings produce three types of waves. An earthquake will usually cause fast-traveling signals, known as Primare, or wave P, followed by relatively long waves in frequency, secondares, or waves S.
The third are long periodic waves that travel the globe after a powerful earthquake. As this type of wave gets closer to the mysterious signal coming from the Mayotte, no earthquake was recorded on the island that could cause such a low and strange frequency.
However, the Mayotte event caused an amazingly monotonous and low frequency signal, making scientists even more curious. The wave was a color and lasted about 17 seconds, totally different from the noisy “ ” quaked by standard earthquakes.
Much of the theories point to a seismic activity that shocked Mayotte in May last year, where hundreds of earthquakes recorded in an open sea area occurred just east of the November 11th quake.
Recently, however, no earthquakes have been recorded in this area, and the frequency of seismic activity has decreased. This has made it even more confusing to experts who are investigating the mysterious phenomenon.
