A magnitude 6.9 - the 1989 Loma Prieta Earthquake hits on live televis, San Francisco Giants
Nature threw World Series a curve in 1989, and Bay Area responded winningly
October 27, 1989: A's, Giants return to field after World Series earthquake – Society for American Baseball Research
Deadly San Francisco Bay earthquake remembered: 20 seconds that jolted the 1989 World Series
1989 World Series photos found: Giants, A's and a quake's shake
30 Years Ago the 6.9 Loma Prieta Earthquake Stopped the 'World Series' and Collapsed the Bay Bridge – NBC Palm Springs
Earthquake World Series 1989 - FoundSF
EARTHQUAKE IN NORTHERN CALIFORNIA; Rumbling Near Sunset Dashes Vision of Baseball - The New York Times
1989 World Series photos found: Giants, A's and a quake's shake