But each year there are about eighteen which measured on the Richter Scale. But each year there are about earthquakes which measure between 7 and 7.9 .These are major earthquakes . The earthquake that destroyed kobe measured 7.2 on the Richer Scale . The earthquake in Haiti measure 7 on the Richter Scale .Geologists knew that two sheets of rock met and formed a sixty – five kilometer fault line near Port - -au –Prince. After the earthquake, they discovered that the two sheets of rock had moved nearly 2 metres in opposite directions against each other .