There are two types of body waves: compressional (P) waves and shear (S) waves. Primary waves (P-waves) travel the fastest, so they arrive at the recording station (seismograph) first. Secondary or shear waves (S-waves) travel slower than P-waves so they arrive second.
Modified frequency modulation (MFM) is an encoding scheme used by PC floppy disk drives and older hard drives.
MSM (methylsulfonylmethane) is an organic sulfur compound thatâs naturally derived during the earthâs rain cycle. Sulfur is present in many natural unprocessed foods, but itâs quickly lost during the cooking process. MSM is gaining a lot of attention due to the recent focus on longevity and anti-aging technologies. Hereâs a list of 7 impressive benefits that MSM delivers: 1. Improves skin health and complexion.