The earthquake measured 7.6 on the W-phase moment magnitude (Mww ) scale at a depth of 90.0 km (56 mi) by the United States Geological Survey (USGS).[2] Meanwhile, GEOSCOPE measured it at moment magnitude 7.7 (Mw ) at a depth of 39 km (24 mi) while the European-Mediterranean Seismological Centre measured it at 7.6 Mw with a depth of 80 km (50 mi).[5][6] It was the result of normal faulting at an intermediate depth along either a west northwest–east southeast striking and shallow north–northeast dipping plane or a east striking and steep south dipping plane.[5] The USGS said that normal faulting events of this size are typically about 75 km (47 mi) × 30 km (19 mi) in size (length × width). Considered an intermediate-depth earthquake, these events represent deformation within subducted slabs rather than at the shallow plate interface between subducting and overriding tectonic plates. They typically cause less damage on the ground surface above their foci than is the case with similar-magnitude shallow-focus earthquakes, but large intermediate-depth earthquakes may be felt at great distances from their epicenters.