The findings of the National Hurricane Center on the trajectory of a tropical cyclone are subject to a certain margin of error. Such a fluctuation in the prediction of the trajectory of a cyclone is known as a cone, due to the shape of the region where the center of the hurricane could pass has that shape. To form the cone, a series of imaginary circles are placed along the predicted path of the hurricane, in the following time positions: 12, 24, 36, 48, 72, 96 and 120 hours. In this way, the size of each circle contains 67% of the margin of error of the official protocols of the last five years. Therefore, the cone is then formed by the union of the set of circles that represent the predicted trend of the passage of any hurricane.
Like earth, venus does not have any major faults or folds or rift valleys ridges on its surface thus it does not have any global tectonic or plates of rock in rotation.
Being a terrestrial planet, the seismic data collected from the moment of inertia and possible due to the planet plates are too rigid to move but the phases of volcanoes have been found in the craters in addition mountains, and valleys are commonly found on rocky lands points out to some degree of tectonics present under the planet.
Also, the size and structure of the plan tell about its core, mantle and crustal zones. Also, venus is supported to have a magnetic field not as strong as the earth which is induced by the ionosphere and Solar Winds.
