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.
So whatâs with the CVM? What does the âCVMâ mean? CVM is actually an acronym where the C stands for Community Television Systems Limited; the V stands for Videomax Limited and the M for Mediamax Limited. The company was inaugurated on July 31, 1990 and was granted its license to operate in Jamaica in March 1991.