score:4

Accepted answer

demo

you should use tooltip.formatter option for customizing the tooltip display.

code:

tooltip:{
       // pointformat:'{point.x}{point.y}{point.z}'
        formatter:function(){
            console.log(this);
            return '<b>'+this.series.name+'</b><br><b>longitude:</b>'+this.x+'<br><b>latitude:</b>'+this.y+'<br><b>depth:</b>'+this.point.options.z;
        }
    },

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