South China Sea Index Map
The area is located in the western Pacific Ocean south of China, east and south of Vietnam and west of the Philippines. The latitude and longitude bounds range from 14 – 24 degrees north and 105 – 120 degrees East respectively. The areal extent is approximately 1,855,000 square kilometers (716,00 sq. miles).
South China Sea IGC 3D Earth Model Bouguer Gravity
The Bouguer Gravity Anomaly Map was generated using Sandwell’s Free-Air Gravity grid version 28.1 and Sandwell’s bathymetry/topography grid version 19.1. The Bouguer corrections for offshore and onshore areas were done using a density of 2.2 g/cc and a density of 2.67 g/cc respectively. The objective of the Bouguer correction is to minimize the effect of high relief bathymetric features observed in the Free-air gravity offshore data, similarly to correct for the excess of gravity effects due to topography above sea level. The resulting Bouguer Gravity Anomaly Map is recommended for qualitative interpretation of tectonic elements and crustal structure. The Map ranges between -159 and 231 milligals and contoured at 5 mGals.