The Earth Is Pulsating Every 26 Seconds, and Seismologists Don’t Agree Why

Every 26 seconds, the Earth shakes. Not a lot — certainly not enough that you’d feel it — but just enough that seismologists on multiple continents get a measurable little “blip” on their detectors. But even though this pulse has been observed for decades, researchers don’t agree on what’s causing it. The mystery surrounding the phenomenon even has its own XKCD web comic.

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Interesting.

I’m going with waves, not volcanoes.

Some computer modelling of the topology, create some waves see what the results are.

Difficult to see how volcanoes could be so rhythmic .

26 seconds, that sounds like Schumann resonances in the ionosphere.

No, my mistake. A frequency of a well known Schumann resonance is 26 cycles per second.

Quite different.

> They were even able to triangulate the pulse to its origin: A single source in the Gulf of Guinea, off the western coast of Africa … narrowed down the source of the pulse even more, to a part of the Gulf of Guinea called the Bight of Bonny.

That’s remarkably specific.

> waves hitting the coast were likely the cause

but

> the pulse’s origin point is suspiciously close to a volcano on the island of São Tomé in the Bight of Bonny. And, indeed, there is at least one other place on Earth where a volcano does cause a microseism with some similarities to this one. (If you’re wondering, it’s Aso Volcano in Japan.)

Looks like it’s time to put a pair of seismometers on the Gulf of Guinea. One on and one off the island of São Tomé.

mollwollfumble said:

> They were even able to triangulate the pulse to its origin: A single source in the Gulf of Guinea, off the western coast of Africa … narrowed down the source of the pulse even more, to a part of the Gulf of Guinea called the Bight of Bonny.

That’s remarkably specific.

> waves hitting the coast were likely the cause

but

> the pulse’s origin point is suspiciously close to a volcano on the island of São Tomé in the Bight of Bonny. And, indeed, there is at least one other place on Earth where a volcano does cause a microseism with some similarities to this one. (If you’re wondering, it’s Aso Volcano in Japan.)

Looks like it’s time to put a pair of seismometers on the Gulf of Guinea. One on and one off the island of São Tomé.

https://www.researchgate.net/publication/258787217_Twin_enigmatic_microseismic_sources_in_the_Gulf_of_Guinea_observed_on_intercontinental_seismic_stations

https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020GL088137