The 1966 Pacific typhoon season was an active season, with many tropical cyclones having severe impacts in China, Japan, and the Philippines. Overall, there were 49 tropical depressions declared officially or unofficially, of which 30 officially became named storms; of those, 20 reached typhoon status, while 3 further became super typhoons by having winds of at least 240 km/h (150 mph).[nb 1] Throughout the year, storms were responsible for at least 997 fatalities and $377.6 million in damage; however, a complete record of their effects is unavailable.
It is widely accepted that wind estimates in the Western North Pacific during the reconnaissance era prior to 1988 are subject to great error. In many cases, intensities were grossly overestimated due to a combination inadequate technology and a lesser understanding of the mechanics behind tropical cyclones as compared to the present day. Additionally, methodologies for obtaining wind estimates have changed over the decades and is not the same today as in 1966. A joint reanalysis of typhoons from 1966 to 1987 was conducted by the Cooperative Institute for Research in the Atmosphere at Colorado State University and the United States Naval Research Laboratory in 2006 to correct some of these errors. Many storms in 1966 received strength reductions as a result of this study; however, the results of the research have not been implemented into the official database. Notably the number of major typhoons, Category 3-equivalent or higher on the Saffir–Simpson hurricane wind scale, was reduced from eight to six, including the removal of a Category 5.[1]
The western Pacific basin covers 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; see 1966 Pacific hurricane season. Tropical Storms formed in the entire west Pacific basin were assigned a name by the Joint Typhoon Warning Center (JTWC). The Japan Meteorological Agency (JMA) also monitored systems in the basin; however, it was not recognized as the Regional Specialized Meteorological Center until 1968.[2] Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), which can result in the same storm having two names; in these cases both storm names are given below, with the PAGASA name in parentheses.
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^John A. Knaff; Charles R. Sampson (2006). "Reanalysis of West Pacific Tropical Cyclone Maximum Intensity 1966–1987" (PDF). American Meteorological Society. Retrieved March 10, 2015.
^"Japan Meteorological Agency Services: International Cooperation". Japan Meteorological Agency. 2014. Retrieved March 10, 2015.
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