1 Inflammation of the gingiva, bone loss, and increased gingival recession may progress slower than with other forms of periodontitis.  Periodontitis Associated with Systemic Diseases - Systemic diseases, such as heart disease, diabetes, and certain forms of arthritis, may have a correlation with periodontitis.
Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
Earthquakes occur when the plate boundaries get stuck together but the plates themselves keep moving. Volcanoes occur when plates crash into or pull away from each other and hot magma from below rises up to the surface in an eruption.nder the right conditions, when plates are pushed together or pulled apart, volcanoes are created, which is why they tend to occur in the same place as earthquakes. When tectonic plates spread apart from each other, hot magma rises up and fills the space between.