GEOPHYSICAL ACTIVITY IN 1974
The principal function of the SEG Geophysical Activity Committee is to gather and compile statistics on worldwide geophysical activity. Statistics are primarily obtained through the survey questionnaire which is mailed out at the beginning of the year to over 1500 companies, government agencies, and universities engaged in geophysical work. This year the returned questionnaires included information on more than 1400 geophysical surveys. All activity is not reported through the questionnaire survey; other methods are used to estimate missing data. Each member of the committee is responsible for a geographical area or a specific application. Committee members are thoroughly familiar with the area on which they report. Each member provides appropriate corrections to make the quantitative picture one that his knowledge and experience tell him it should be. The statistics reported on the questionnaire are thus augmented with company scouting reports, reports of scouting services, and by comparison with other published surveys.