Magnitudes are based on a logarithmic scale (base 10). For each whole number you go up, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and 32 times as much energy would be released).
1 unit increase corresponds to 10 fold increase in magnitude.
The winds that pushing the sasiling ship from north, but they are also curving to west. theses winds are known as : d. polar easterlies. polar easterlies is the wind are blowfrom east to west.
