When seismic waves such as P-waves and S-waves, pass through the Earth, these seismic waves will produce seismic wavelets when reflected into the receiver or recorder. The amplitude of the reflections depends on the acoustic impedance within the Earth. These reflections produce seismic wavelets. During acquisition, there are delays in the air gun or the vibroseis. Phase and polarity checking is important to ensure the events are correctly mapped in the seismic data. It is also to recognise high amplitude reflections as well as to understand their geologic cause. The phase checking was also done to understand whether the reflection package studied is caused by single interface or by a layer with interfaces top and base.

 We have done phase checking to ensure the seismic processing has been done correctly. From the data, we have observed a zero phase in the wiggles. Zero phase can be identified by two smaller wiggles encompassing a larger wiggle.