**Abstract**

Today, large lengths and compressions of the Earth's crust can be measured with great precision using GNSS satellites. This makes it possible to accurately determine how much the distances were shortened in 1 day under the action of compression, every day, 24 hours a day. If most of the distances were shortened in 1 day, compression of the Earth's crust has occurred, and it can be expected that an earthquake will occur in 2 to 3 days. An earthquake occurred in Skopje after 3 days of compression. We have also analyzed several other earthquakes that occurred after 2 days of compression: the Kraljevo earthquake of 2010, the Drežnica earthquake of 2013, and the Zagreb earthquake of 2020. Based on the conclusions of our analyses of all of these earthquakes, we propose that the Zagreb office for crisis management organize a department that would use satellite monitoring in the vicinity of faults under compression every day.

**Keywords:** earthquake, forecasting, GNSS satellite
