It is reported by the US Geological Survey.

Prelim M5.6 Earthquake Dodecanese Islands, Greece Jan-30 01:28 UTC, updates https://t.co/B2k5JS9xHj

- USGS Big Quakes (@USGSBigQuakes) January 30, 2020

The center of the earthquake lies at a depth of 10 km.

Earlier, an earthquake of magnitude 5.9 occurred in the waters of the Moluccan Sea in central Indonesia.