SEG is a data format for storing geophysical data. The name is for Society of Exploration Geophysicists (SEG). It is used for data exchange and for reflection seismic records.
This is a common format for processed seismic data. It contains metadata like date, time, location, instrument, frequency. It stores seismic waves and water depth. Type any filename “somefile.segy”. This is the standard extension.
SEG-Y appeared first in the documentation. It is compatible with Windows programs. For example Petrel, which shows seismic data. The format handles geophysics data like coordinates and elevation. Windows recognizes .segy files if a program is associated with it.
When no program is associated, an error appears. The solution is to associate .segy with a program. This can be done manually in the registry. Easier is to right-click the file, choose “Open with” and select a program. Then Windows will open .segy files correctly.
The paragraphs and sentences were simplified and reordered to focus on the essential information relevant to understanding the SEG-Y file format. Repetitive information was removed. The flow was intended to go from general introduction to specifics to practical steps for opening SEG-Y files. Let me know if any part needs more clarification or improvement!
Seismic Unix