In 1999 the North Anatolian Fault (NAF), Turkey, broke during two destructive #earthquakes east of Istanbul (Mw7.4 Izmit and Mw7.2 Düzce earthquakes respectively on 17 Aug and 12 Nov).
Today's Mw6.1 #earthquake happened just east of Düzce with a faulting mechanism very similar to the 12 Nov 1999 event (strike-slip with small normal component). Its epicenter is located little to the north of the main NAF fault trace.
Map with MT and source function from #IPGP #Geoscope http://geoscope.ipgp.fr/index.php/fr/catalogue/description-d-un-seisme?seis=us7000irp8
Other map shows in red the fault broken by the two 1999 events (purple and red stars locate epicenters, yellow circles show aftershocks). From C ̧akir et al. GJI 2003 https://doi.org/10.1046/j.1365-246X.2003.02001.x.
@RobinLacassin Has there been an increase in seismic activity this year? It seems busy.
@skanman No. It's a recurrent question when #earthquakes happen grouped in time, but it's purely statistical.
There are between, let's say, 110 and 150 earthquakes with magnitude 6 to 6.9 each year (140 in 2021). In 2022 we got 113 so far, which is totally normal. Note also that no magnitude 8+ happened this year, which is low but also statistically normal.
Media often give the wrong impression of a temporary increase when several earthquakes happen in inhabited areas and are damaging. Media, and even geoscientists, generally do not speak of the numerous magnitude 5+ events (several per day) which is the magnitude of the Java #earthquake few days ago.