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  ______     ___      ______   __   __            
 /_   _//   / _ \\   /_____//  \ \\/ //     ___   
 `-| |,-   | / \ ||  `____ `    \ ` //     /   || 
   | ||    | \_/ ||  /___//      | ||     | [] || 
   |_||     \___//   `__ `       |_||      \__ || 
   `-`'     `---`    /_//        `-`'       -|_|| 
                     `-`                     `-`

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Text this: Interpretation of second order vertical derivate of magnetic field data anomaly for determine position of geothermal sources at Ungaran volcano area