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Groundquakes were natural phenomena on rocky planets. As the planet's core spun, convection currents created rift zones, faults, and plates on the surface. When two plates slid past each other, or one under another, the immense friction caused a groundquake. Anything caught in the shock wave could be damaged or destroyed from shaking.

A groundquake's intensity was measured in standard magnitude[1] or the Imperial quake scale.[2] A groundquake rated 77.88 on the latter scale was considered fairly major.[2]

Natural occurrences of groundquakes[]

Groundquakes were common to Berchest,[1] Shola, Riflor, Velusia, and many other planets. The planet Aleen was devastated by a series of groundquakes, after which the Republic sent a relief effort.[3]

In 43.5 ABY, groundquakes occurred on the planet Kessel.

Artificially created groundquakes[]

When Bao-Dur's Mass Shadow Generator was activated once again on Malachor V, it unleashed massive and devastating groundquakes that literally tore the planet apart.[4]

The initial shot on Despayre from the first Death Star's superlaser triggered massive groundquakes and shifted entire tectonic plates.[5]

During the Conquest of Makeb, Imperial forces detonated explosives throughout the planet's caves to simulate a groundquake.[6]



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