Little project I'm doing (on another rainy day here) is comparing some bigger earthquake aftershock sequences around the world,
the inspiration came from the recent quakes in Italy and the triggering effect that is happening.
this has happened before here in NZ
Cook Strait NZ in 2013
I know that the geology might be different in the various places, I'm putting in Turkey, California and Japan as well for comparison (I'm convinced
that the SW off Kyushu triggered the Kumamoto quakes)
this may take a while, I started with L'Aquilla which I gathered data for 8.8 months, so I need to go back and get longer term data for some of the
Many were cut short by the next big quake in the sequence, such as was the case with Accumoli into Visso then Norcia, but it's still interesting to
see the numbers.
FWIW one new bit of info when I was updating the data was that the Cook Strait M6's of 2013 have be reviewed and the magnitudes have changed;
previously it was 6.5 and 6.6. Latest update shows M6.4932 and M6.4687 respectively, so the energy released by the first one was more @
82,849.643TTNT (2nd one was @ 76,131.0508TTNT)
This is where accuracy is important, those Networks that just use one decimal point do us a disservice, and distort the energy measurements. On the
face of it with one decimal point we had two M6.5's but with more digits we have a difference of 6718.5922 Tons of TNT, not something to be sniffed
at, equal to a M5.77 quake alone, which is significant, apart from the fact the two 6's are reversed in size, making the 2nd one an "aftershock" of
here is my table so far, there are plenty more I can add yet
I have been trying to think of the word that described the termination of one sequence and it is replaced by with a new one. The closest I can find is
the word "vicariance" which means "the division of a widespread group of organisms by a geographic barrier, such as a mountain range or a body of
water, often resulting in the evolution of related species on either side of the barrier."
But that's not really it in relation to these seqences, as the division is caused by something new happening
anyone got a better word?
edit on 1100000030530516 by muzzy because: you didn't think I could write all that without making a mistake? Came back and fixed some