Sentence:  The most infamous of all was launched by the explosion of the island of Krakatoa in 1883 ; it raced across the Pacific at 300 miles an hour , devastated the coasts of Java and Sumatra with waves 100 to 130 feet high , and pounded the shore as far away as <WSD>San</WSD> Francisco . 
Meaning of the word marked with <WSD> tags:  a port in western California near the Golden Gate that is one of the major industrial and transportation centers; it has one of the world's finest harbors; site of the Golden Gate Bridge