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Geologically dead does not mean there are no quakes.
There may be no more tectonic movement, no continent drift. But radioactive decay in its core does not stop, fueling local magma flows when the planet as a whole gets solid, nor do buildup and sudden releases of stresses caused by these disappear.
I'd be surprised if any celestial body as young as our solar system and bigger than our moon would have stopped generating quakes already.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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