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.
Along Faults. Earthquakes can also occur far from the edges of plates, along faults. Faults are cracks in the earth where sections of a plate (or two plates) are moving in different directions. Faults are caused by all that bumping and sliding the plates do. They are more common near the edges of the plates.
Earthquakes also occur along fault lines in the Earthâs crust. Faults are basically cracks in the continental or oceanic plates triggered due to plate tectonics. The crust is highly unstable in the vicinity of fault lines and disturbances along the fault lines might trigger massive earthquakes. 3. The Circum-Pacific Seismic Belt Or The âRing Of Fire.