This equatorial sundial was created and installed by staff members Leon Hall and Joseph Frame in 1957. The ring is made of high-nickel bronze and has an outside diameter of 34 inches. Engraved markings on the ring allow tracking movement of the shadow and thereby to keep time using the Sun. The ring is held in position by a clamp, which can be loosened to allow rotation of the ring when adjustments are needed (such as when Daylight Saving Time begins and ends). The heavy wire passing through the center of the ring, and at right angles to it, is made of a nickel-copper alloy. It is parallel to the Earth's axis, being accurately mounted in a north-south direction and pointed to the north pole of the sky. The angle it makes with the horizon is 34 degrees, which is equal to the latitude of Los Angeles. The Sundial provides an appreciation of the role of the rotating Earth as the fundamental timekeeper.
Griffith ParkGriffith J. GriffithLos AngelesObservatoryGriffith Observatorysundial