The data points of *E*(*B-V*) &lt; 0.14 with its FUV intensity of less than 1500 CU correspond to the blue region in Figure \[fig:fims\](a): among these data points, those of higher FUV intensity correspond to the inner region of the OES shell while those of lower FUV intensities correspond to the outer regions of the OES shell. Both of them seem to show a good linear relationship, implying more or less constant radiation fields.

The data points of *E*(*B-V*) &lt; 0.14 with its FUV intensity of above 1500 CU generally correspond to the regions of light blue to yellow around the boundary of the thick dust region. These regions show high FUV intensity due to the strong UV radiation fields produced by the nearby B type stars. The strong UV radiations from these bright B type stars also affect the optically thick region in the eastern part of the Orion Molecular Cloud Complex (henceforth OMCC): the data points of *E*(*B-V*) &gt; 0.14 and the FUV intensity above 2500 CU correspond to the regions of yellow to red in the eastern part of the Complex in Figure \[fig:fims\](a). The data points of *E*(*B-V*) &gt; 0.14 and FUV intensity &lt; 2500 CU 