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The light recombines on the other side of the barrier, creating an interference pattern of bright and dark stripes, also known as an interferogram.

The interference measurements in each telescope can be recorded and later used to reconstruct an interferogram.

Astronomers would physically transport these QHDs—by road, rail or air—to one location, where the quantum states would be read out and made to interfere, generating an interferogram.

The scientists turn this information into an interferogram - a colourful, but highly technical, depiction of the displacement that occurs on a fault.

Facebook Twitter Pinterest Credits: Sentinel-1A/ESA An interferogram created by combining two Sentinel-1A radar scenes over the Danube Delta in Romania.