What scientists observe is a persistent seismic pulse with a period of about 26 seconds, recorded continuously by seismographs worldwide. It was first identified in the early 1960s and, unlike earthquakes, it is remarkably steady and rhythmic.

What scientists observe is a persistent seismic pulse with a period of about 26 seconds, recorded continuously by seismographs worldwide. It was first identified in the early 1960s and, unlike earthquakes, it is remarkably steady and rhythmic.

Today, the leading explanation is not mysterious in a supernatural sense, but still fascinating:

The signal is primarily linked to ocean wave energy, especially standing waves interacting with the continental shelf and seafloor.

A major source region has been traced to the Gulf of Guinea (off the west coast of Africa), where long-period ocean swells repeatedly strike the shelf at just the right geometry to generate this resonance.

These interactions create low-frequency seismic waves that propagate through Earth’s crust and are detected globally.

However—and this is where your paragraph remains accurate in spirit—

the phenomenon is not fully “closed” scientifically:

The signal’s stability over decades, despite changing ocean and climate conditions, is still actively studied.

Some researchers explore how Earth’s internal structure amplifies or sustains the rhythm once it is generated.

It has become an important tool for studying Earth’s interior, much like a natural ultrasound.

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> Far from myth, this quiet pulse is a reminder that Earth is not inert—but dynamically alive, resonating continuously through the interaction of ocean, crust, and deep planetary structure.