body {
    padding: 0;
    margin: 0;
   }
   html, body, #earthquakemap {
    height: 100%;
    width: 100%;
   }
   
#earthquakemap {
  position: relative; 
}

#legend {
  position: absolute; 
  bottom: 10px;       
  left: 10px;         
  background: white;
  border: 1px solid black;
  padding: 10px;
  width: 140px;
  font-family: Arial, sans-serif;
  z-index: 1000;      
  
}

#legend span {
  display: inline-block;
  width: 15px;
  height: 15px;
  margin-right: 6px;
}