Thunder + fiber-optic cabling used for seismic imaging

The Earth's interior is largely understood through the observation of seismic waves, which travel at varying speeds depending on factors such as the rock's composition, moisture content, and structural integrity. By analyzing seismic data from various sources, scientists can construct a detailed map of the Earth's subsurface. While natural phenomena, like earthquakes, provide valuable insights, researchers have also learned to induce seismic waves artificially, using techniques such as explosions, to create targeted images without relying on spontaneous events.

A team from Penn State University has now proposed an innovative approach that could bridge the gap between waiting for a natural event and inducing one: thunderstorms. During thunderstorms, the electrical discharge generates energy that can travel into the Earth's upper crust, causing minute disturbances known as "thunderquakes."

However, the seismic signals generated by these events are notoriously complex, hindering efforts to extract clear information. The Penn State researchers believe they have developed a sophisticated model capable of unraveling this complexity, allowing for clearer reconstructions of the Earth's terrain beneath local areas, such as their own campus.