The answer is subtropical
When the sun<span>, </span>moon<span>, and </span>Earth<span> are in </span>alignment<span> (at the time of the new or full</span>moon<span>), the solar </span>tide<span> has an additive effect on the lunar </span>tide, creating extra-high hightides<span>, and very low, low </span>tides<span> — both commonly called </span>spring tides<span>.</span>
How does the Earth create a magnetic field?
The Earth’s magnetic field is created by the rotation of the Earth and Earth's core. It shields the Earth against harmful particles in space. The field is unstable and has changed often in the history of the Earth.
