It measured 6.9 on the moment magnitude scale and had a maximum intensity of 7 on the JMA Seismic Intensity Scale .

On December 7 the cyclone Catastrophe reached Arriving its peak intensity with winds of 185 km/h , ( 115 mph ) which made Causation Daman a Category 4 cyclone Catastrophe on the Australian Tropical Cyclone Catastrophe Intensity Scale .

It attained Achieve peak winds of 165 km/h ( 105 mph ) while moving Motion over Vanuatu , making it an intense Category 4 cyclone on the Australian Region Tropical Cyclone Intensity Scale .

The shock Motion had a moment magnitude Cause_change_of_position_on_a_scale of 7.4 and a maximum Mercalli Intensity of VII ( `` Very strong '' ) .

Intensity leveled off afterwards as Dot tracked Motion westward before making Causation a curve towards the northwest on August 5 , after which the hurricane weakened Cause_change_of_strength at a faster clip .