OSCE Special Monitoring Mission inspecting Scrutiny the place of incident assessed Testing from its study of five craters that they were caused Causation by `` rockets fired Use_firearm from a north-north-eastern direction '' .

After landing near Savannah on December 23 , Campbell assessed Testing the American defenses , which were comparatively weak , and decided Deciding to attack without waiting for Prevost .

Fern peaked north of Yap on December 26 , with JTWC assessing winds of 150 km/h ( 90 mph ) , while the Regional Specialized Meteorological Center , Japan Meteorological Agency ( JMA ) assessed Testing peak winds of , just below typhoon strength .

the india meteorological department estimated Testing peak winds Self_motion of 145 km/h ( 90 mph ) , while the american-based joint Forming_relationships typhoon warning center ( jtwc ) assessed peak winds Self_motion of 215 km/h ( 130 mph ) .

Around the same time , the JTWC assessed Testing the storm Catastrophe to have been equivalent to a Category 1 hurricane .

The earthquake Catastrophe was measured at 7.1 on the Richter magnitude scale and the intensity of shaking in the epicentral region has been assessed Scrutiny from historical records as VIII ( `` Severe '' ) on the Modified Mercalli Scale .

A maximum Mercalli intensity of VIII ( `` Severe '' ) was assessed Check for several locations , though less intense shaking Motion was observed Know at many other locations in Washington , Oregon , and British Columbia .