More info on this earthquake
Scientist say this earthquake came from a known fault, which is called the Tyrnavos fault. This fault was active back in 2019 with a swarm of small earthquakes, up to 3.1R
In the last 10 years it had around 150 such small quakes.
Now here's the point. Scientists have studied it for many years, as this is a really old fault, its lower layers go back to the ice age, 20.000 years ago.
The fault is 15 km long, and 12- 13 klm deep, as far as they can say. They already knew it can give a quake up to 6.2R.
But it is not in the lists as a historic fault. Which means there are no written historic sources of quakes from this fault. We only know of two big quakes which damaged a temple near by, one from the 1BC century and one from the 6th to 9th century AC. But its not sure it is this fault's activation.
What we know
The Tyrnavos fault gave 20 earthquakes in the last 20.000 years (taken from the layers they found).
That is, the average of the average, an earthquake every thousand years or 800 years.
And it happened today.
sources in greek (from 2014 and 2019)
[
link to www.eleftheria.gr (secure)]
[
link to www.tirnavitikanea.com (secure)]
Ostria