Commment first by me than article. Humans increase earthquake threat Antarctica to humanity. If the following article can be applied to the Antarctic, then the resulting weaknesses of the ice shelves there could allow a major cracking and removal of the Ice in the ice shelves. This will allow the massive amount of ice behind it to enter the oceans at one time. This would cause a catostrophic rise of the oceans with a catostrophic threat to shore lines.
IE an actual quake in the Antarctic or P and S wave involvement.
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Article....

A new study says there is now very little doubt that human-induced warming is behind the rapid thinning of Arctic sea ice seen in recent years.

An area equivalent to the size of Texas has been lost over the past 20 years.

Polar researchers combined five different data sets and two computer models of global warming trends and found that the probability of such a loss occurring purely as a result of natural climate forces was less than two percent.

Although many studies have shown how the ice cover and thickness in the northern polar region is in sharp decline, not all scientists have been in agreement as to the cause.

However, the researchers led by Konstantin Vinnikov from the University of Maryland are uncompromising in blaming human influence.

Computer models

"The probability is very low that the observed and modelled trends are due exclusively to random variations, assuming that the models' natural
variability is similar to that found in nature," the team report in the journal Science.

"This strongly suggests that the observed decrease in Northern Hemisphere sea-ice extent is related to anthropogenic (man-made) global warming."

The scientists used a computer model to show how much ice there would be if humans had not pumped carbon dioxide into the atmosphere. A global climate model simulating natural changes over 5,000 years was used to put the findings in a longer-term context.

It revealed that the probability of a negative trend over 19.4 years as large as that seen from the satellite data was less than two percent.
Another computer simulation was then run which included increases of warming greenhouse gases and cooling aerosols.

The results incorporating these human-induced changes matched the observed sea ice losses much more closely. They suggested that the sea ice decreases were largely the result of greenhouse gases accumulating in the atmosphere during the second half of the 20th Century.