The existing data for this earthquake include both the general tectonic environment of the region and the teleseismic information. The main shock was located offshore, 8 km North East of the island, and it triggered a seismic sequence that lasted for several weeks.
In July 1998, an M w = 6.2 earthquake struck the islands of Faial, Pico and San Jorge (in the Azores Archipelago), registering VIII on the Modified Mercalli Intensity scale and causing major destruction in the northeastern part of Faial.