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There is speculation that the more frequent stronger typhoons later this year is due to the La Nina effect and the westward migration of warmer seas. When these warm water-dependent storms develop further away they have more time to gain strength.
Then again, Taiwan has had it's fair share of typhoons over the years. This map, from Wikimedia Commons, shows the tracks of all tropical cyclones in the Northwest Pacific Ocean from 1980 to 2005. The International Date Line, on the right, is the eastern boundary of the basin. The points show the locations of the storms at six-hourly intervals. Taiwan and lucky Luzon are almost invisible.
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