underground gas storage (UGS), in the Gulf of Valencia (Spain). According to the reports by
the Spanish Instituto Geográfico Nacional (IGN), more than 550 events occurred during two
months, the strongest having a magnitude of M w= 4.2 which took place two weeks after the
gas injection stopped. The low magnitude of the events (with only 17 earthquakes having m
bLg greater than 3), the lack of nearby stations, and the inhomogeneous station distribution …