I want to know the answer to the following question:
What did they collect to use in this method?
All the background I'm provided with is that "Cyril and Methodius University of Skopje in Macedonia and Strachimir Mavrodiev from the Bulgarian Academy of Sciences attempted to establish a "time prediction method" through collecting statistics on geomagnetism with tidal gravitational potential.". Is that enough to answer the question?
Answer: yes