Are tsunamis and earthquakes related to global warming?

No, not especiallly (except to the extent that it changes commercial and other emissions of greenhouses gases in the place affected by the earthquake due to damage, etc. -- emissions may go down due to damage to factories, etc., or they may rise due to construction and rebuilding projects). The earthquake itself has no significant affect on global warming.

THAT IS ALL FALSE glaciers and ice sheets that cover much of the area around Earth's poles plus mountains at all latitudes. The weight of ice depresses the crust on which it sits. As the ice melts, the crust below no longer has anything sitting on top of it, and so can rebound fairly rapidly (by geological standards). (This rebounding is actually occurring now as a result of the end of the last Ice Age: The retreat of massive ice sheets from the northern United States and Canada has allowed the crust in these areas to bounce back.) Areas of rebounding crust could change the stresses acting on earthquake faults and volcanoes in the crust.