The great earthquake of 1906 struck San Francisco on April 18, around 5 in the morning. While the earthquake already caused a lot of damage, it was the subsequent fire that ravaged the city: the earthquake had broken the water pipes, and so it was impossible to fight the fire because the hydrants were not working. Except for the hydrant at Church and 20th, which saved my house and a good part of the mission. The hydrant is painted golden, and once a year, on the anniversary of the earthquake, the fire department repaints it and leaves a token of appreciation. (They actually do it at 5 in the morning.)
By the way, there are two faults that can cause earthquakes in the San Francisco Bay Area. One is (our stretch of) the San Andreas fault, which runs close to the ocean, and which caused the 1906 quake and the 1989 one, and which may not be an imminent risk given the energy released in 1989. The other is the Hayward fault, which runs near Berkeley. The Hayward fault had big earthquakes in 1315, 1470, 1630, 1725, and 1868, that is about every 100-140 years, with the last one being 146 years ago…
25 years ago on April 15, Hu Yaobang died. The day before his funeral, about 100,000 people marched to Tiananmen square, an event that led to the occupation of the square, and which culminated in what in mainland China used to be referred to as the “June 4 events,” and now as the “I don’t know what you are talking about” events.
Also, something happened, according to tradition, 1981 years ago.