Table 4 Training/testing partition for events according to the maximum Mercalli intensity of each seismic movement. High energy events are less frequent than low energy events. Note that this table summarizes our dataset in terms of number of earthquakes, but for each of these earthquakes we have many municipality-level local instances. In fact, as high energy earthquakes cover a wider area, they produce many municipality-level instances

From: Nowcasting earthquake damages with Twitter