Magnitude 4.5 earthquake shakes San Francisco Bay area days before Loma Prieta anniversary

4.5 earthquake in SF area

Mark Ulicki, a Walnut Creek resident, tweeted that there was a "big shaking" that caused broken glass and "lots of car and business alarms going off."

The quake took place three days before the 30th anniversary of the 1989 Loma Prieta earthquake. The 6.9 magnitude earthquake killed 63 people and injured thousands.

Many locals took to Twitter to share their unease at Monday's earthquake taking place almost exactly three decades after the deadly shock.