S (the synodic period) = 360 / (360/ P - 360/365.256) days. S (the synodic period) = 360 / (360/365.256 - 360/ P) days. A diagram showing the relationship between orbital size and synodic periods. As the planets move around the Sun they change their positions relative to each other.
Some geologists consider that mantle plumes are generated in the lower levels of the asthenosphere by the decay of concentrations of radioactive isotopes. However, many believe that they are generated at much deeper levels in the lower mantle, perhaps even at the boundary of the mantle with the outer core.
Tsunamis in the Pacific Ocean. Tsunamis occur most frequently in the Pacific, particularly along the Pacific Ring of Fire. This zone is found at the northern edge of the Pacific Plate and refers to the geologically most active fields of the earth.Several times a year, strong earthquakes of at least 7 on the Richter scale result in tsunamis.sunamis occur most frequently in the Pacific, particularly along the Pacific Ring of Fire. This zone is found at the northern edge of the Pacific Plate and refers to the geologically most active fields of the earth. Several times a year, strong earthquakes of at least 7 on the Richter scale result in tsunamis.