Instead, the earthquake is related to a province of extensional tectonics surrounded by compressional zones which form structures like grabens in the region.

More specifically, related to the earthquake is the Florina-Vegoritis-Ptolemais Graben, which is a large Cenozoic basin extending from Bitola of North Macedonia all the way to the Kozani area.

[8] This basin is filled with Neogene sediment which covers the Paleozoic metamorphic rocks and Mesozoic limestones below it, which make up the basement of the graben.

[9] Running through the basin can be found many southwest–northeast directed lengthy normal faults which are hard to locate since they're covered by Neogene-Quaternary sediments.

[12][13] The Mw 6.6 earthquake struck at 08:47:12 GMT on 13 May 1995, in Northwestern Macedonia, Greece, at a depth of 14 km (9 mi) along the normal Paleohori Fault.

[14] A different paper, using a waveform modelling system, obtained a focal mechanism with a depth of 11 km (7 mi), trending northeast–southwest with a dipping angle of 41 degrees to the northwest.

Multiple sand and mud volcanoes were observed in this area with an NW-SE orientation, as well as some with a NE-SW direction which coincides with the Servia Fault strike.

[4] In July 1993, a group called VAN (standing for the first letters of the last names of the creators) in Greece installed an electric and magnetic station nearby their base in Ioannina.

Outside of seismologists in Greece, Xavier Le Pichon of ENS Paris suggested that the VAN group cannot claim success on barely any observations.