Mysterious Seismic Waves Rippled Around The Earth

Posted: Dec 1 2018, 10:21pm CST | by , Updated: Dec 1 2018, 10:28pm CST, in Latest Science News


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Mysterious Seismic Waves Rippled Around the Earth
Credit: Anthony Lomax

The low-frequency ringing was detected earlier this month by U.S. Geological Survey.

Last month, a series of mysterious seismic waves shook the entire Earth, but surprisingly no human noticed it.

The seismic waves began on Sunday November 11, near Mayotte, a French island located between Africa and Madagascar and traveled through the vast oceans. Seismic sensors picked up the activity as far as Chile, New Zealand, Canada, and even Hawaii nearly 11,000 miles away. But researchers don't know why this seismic event occurred around the world as it was not followed by an earthquake.

“I don't think I've seen anything like it.” Göran Ekström, a seismologist at Columbia University told National Geographic.

Seismic waves are typically triggered when an earthquake strikes. Nearby seismic receivers pick up these waves from ground-shaking sources, at various speeds and intensities, which researchers can use to determine the origin or location of an earthquake.

The sound of the mysterious seismic waves continued for 20 minutes and detected by U.S. Geological Survey's real-time seismogram displays which keeps global records of seismic activity especially earthquake hazards.

Analysis suggests that this new activity may linked to some kind of magmatic movement or a new volcano may be developing off the coast of Mayotte. Mayotte was created by volcanic activity, but it has not erupted in over 4,000 years. Since seismic waves were likely too faint to be picked up by sensors in the world, the activity is taking place miles from the coast under thousands of feet of water.

“The location of the swarm is on the edge of the (geological] maps we have,” said Nicolas Taillefer from French Geological Survey (BRGM). “There are a lot things we don't know. It’s something quite new in the signals on our stations.”

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<a href="/latest_stories/all/all/47" rel="author">Hira Bashir</a>
The latest discoveries in science are the passion of Hira Bashir (). With years of experience, she is able to spot the most interesting new achievements of scientists around the world and cover them in easy to understand reporting.




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