All: all earthquakes (except false).
Strong: "strong" eartquakes following the definiton given in the CFTI3 catalogue (Intensity > 8).
Unknown: earthquakes unknown to the CPTI04 reference catalogue.
New: earthquakes that were not listed in the CFTI3 catalogue (or that underwent significant revision since its publication).
False: "false" earthquakes (earthquakes that never occurred).
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