Teams played six or seven exhibition games. In 1966 (and 1960), the NFL had an odd number of franchises, so one team was idle each week. In 1978, the league changed the schedule to include sixteen regular season games and four exhibition games. From 1978 through 1989, the sixteen games were played over sixteen weeks.
At 5:36 p.m. on March 27, 1964, a 9.2-magnitude earthquake erupted 78 miles east of Anchorage, Alaska. The earthquake remains the most powerful earthquake to strike North America, and the second-largest earthquake ever measured.
The largest earthquake in southern California since the Fort Tejon earthquake of 1857 and the Owens Valley earthquake of 1872, the Kern County earthquake of 1952 caused immense and widespread damage. The quake occurred on the White Wolf fault, a reverse fault (with some left-lateral component of slip) north of the intersection of the Garlock and San Andreas faults.