Chilling from-the-scene update on my Greenland on Verge of Meltdown article in August: the Greenland ice cap is melting so quickly that it is triggering earthquakes as pieces of ice several cubic kilometres in size break off says Guardian reporter in Greenland.
UPDATE:
Here is a satellite view of Lulissat, Vestgronland Greenland just pan and zoom to the upper glacier to see the meltwater on the ice (not sure when this satellite pic was taken)
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Related stories:
The Earth is Going Dark Scientists Say
US Generals Say Warming Poses Major Security Threat
Climate Panel Report Called Too Conservative
Stephen Leahy, International Environmental Journalist 
[…] Tipping point: Greenland ice melt shakes Earth Stephen Leahy’s headline sounds almost hysterical: “Greenland Ice Collapse Producing Earthquakes.” […]
Magnitude of the quakes varies between 1 and 3.
On the Richter scale, a magnitude 3 quake is barely perceptible to humans.
http://en.wikipedia.org/wiki/Richter_scale