The scope of this article is limited to the Pacific Ocean, north of the Equator and west of the International Date Line. Storms that form east of the Date Line and north of the Equator are called hurricanes. Tropical storms forming across the entire West Pacific basin were assigned a name by the Joint Typhoon Warning Center (JTWC). Tropical depressions in this basin have the "W" suffix added to their number by the JTWC. Tropical depressions that enter or form in the Philippine area of responsibility were assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), which can often result in one storm having two seperate names.