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 in the interior of a plate less frequently. There are different kinds of earthquakes and different kinds of faults. A strike-slip fault causes horizontal movement and shaking. Dip-slip faults create the vertical motion. In normal dip-slip faults, the earth falls inside. In a dip-slip thrust fault, the earth is pushed upwards.