Earthquakes often take place where two continental plates collide. When the plates' edges push against each other, devastating forces are released that cause the Earth to shake.
Greece has emerged unscathed after an earthquake with a magnitude at least 6.4 struck off the west coast. The tremor could be felt as far away as Libya.
Seismographs are highly sensitive devices, and they do a good job of registering earthquakes at specific locations. But fiber optic cables — the data lines that delivered these words — can do much, much better.
Earthquakes are very common in Iran and Iraq. That's where the Eurasian and Arabian Tectonic plates meet and where the Zagros mountain range developed – the location of the latest quake.
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