I think you may have some slightly crossed wires... Land ice, such as that which covers Greenland and Antarctica, does indeed depress the local crust. Exactly

I think you may have some slightly crossed wires... Land ice, such as that which covers Greenland and Antarctica, does indeed depress the local crust. Exactly how much we're not quite sure, but ice penetrating and non-penetrating radar observations over both places has revealed that as the ice mass decreases, the crust uplifts, very slowly. This actually amplifies sea level rise, as you have both the melt water and the additional displaced volume from the uplifted land to account for. As to pings and bongs, totally. A lateral movement in one place or expansion or uplift could all increase tension elsewhere, which would then be released as an earthquake. The most readily observed example of this is aftershocks, which are often hypocentred near but not at the original hypocentre.