Saturday, September 5, 2015

Aleutian islands quake possible?

There is always the possibility of a quake in the Aleutian islands, prediction of such an occurrence is nearly impossible.  Looking at the earthquake map for today I did notice a short term trend that I found curious.

On July 26th there was a 6.9 earthquake south of Yunaska island in the Aleutians, this resulted in a large group of aftershocks, unfortunately since it was over a month ago I do not have the ability to pull up if there were foreshocks in the same are.

Currently there is a small earthquake grouping well to the west, south of Atka.  Yesterday there were a series of quakes in the 4.5 range with a few more slightly to the east today in the 5.0-5.5 range.  It s possible that there is a seismic gap between Yanaska and Atka, as it looks as if there have not been any major shakes in this area in quite some time.  If the space between these two were to let go it would likely result in a quake in the range of 7.5 and a possible tsunami, although much larger quakes have occurred, it would take more than a slip between these two points to release that quantity of energy.

Anyway, I am not saying this is going to happen, but it looks curious and is worth paying attention to.  Earthquakes are notoriously unpredictable, but with the seismic network that we have at our disposal now it is worth paying attention to how and where things are happening.

USGS Earthquake map (great link to save)