Natura - nature actualia - actual entities Mundus Plinius - physical world Astra Plinius - celestial bodies Universe (Supercluster) Virgo-Hydra-Centaurus Supercluster (Supercluster) Virgo Supercluster (Cluster) Local Group (Galaxy) Milky Way Galaxy veter. (Spiral arm) Orion Arm (Region) Local Bubble Local Interstellar Cloud (Planetary system) Solar System (Planet-satellite system) Earth System (Planet) Earth veter. "spheres" (Earth) (Sphere) Lithosphere (Earth) - layer of rock "tectonic plates" (Fault) San Andreas Fault (Pacific Plate/North American Plate) Phenomenon earthquakes (San Andreas Fault) (Event) 1857 Fort Tejon earthquake (9 Jan 1857) (Event) 1906 San Francisco earthquake (18 Apr 1906) (Event) 1989 Loma Prieta earthquake (17 Oct 1989) (Event) 2004 Parkfield earthquake (28 Sep 2004)