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Scientists have found a weak repeating signal in Earth’s background noise that occurs roughly every 26 seconds by studying long-term seismic and satellite data.

That faint “microseismic” throb was first detected back in the 1960s. Humans can’t feel it, but sensitive devices around the globe pick it up all the time.

Its main explanation is related to the interaction between ocean wave energy and the seafloor, particularly in the region of the Gulf of Guinea. As waves crash into each other, constantly interfering with each other, they create pressure variations that travel through the Earth and are recorded as a rhythmic signal.

Some studies look at other factors that may contribute to the activity, like local geological or volcanic activity, but the ocean-wave interaction is the most accepted source.

It’s often called the “heartbeat” of the Earth, but it’s more like a constant background vibration of our planet, not a literal biological rhythm.

There are more than 10,000 active Starlink satellites in low Earth orbit. This makes it the largest satellite constellation ever made. Since 2019, more than 11,500 satellites have been launched, but some of them have already come back down to Earth.

Created by SpaceX as part of the Starlink project to give people all over the world access to the internet.