The correct answer is - the locations and strengths of the earthquakes.
A geologist provided with seismograms from multiple different locations on the Earth will get the information about the geologic activities on all of those places.
By analyzing the data, the geologists will be able to understand where the earthquakes appear more and where less, what is their intensity, and which locations the intensity is bigger and on which smaller.
By further analyzing, the geologists will be able to understand and why the earthquakes appear more at some places and less at others, as well as the connection with their intensity.
