As noted, tremors are recorded at a depth of 10 km.

Prelim M5.6 Earthquake Albania Sep-21 14:04 UTC, updates https://t.co/3GUdOA3gl5

- USGS Big Quakes (@USGSBigQuakes) September 21, 2019

Earlier, seismologists recorded an earthquake of magnitude 5.4 in the US state of Alaska.