event     event_type                sta       cast      date           time      lat       lon       depth_w     activity_and_comments                depth       press    bot      
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   5           5.5      14       
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   5           6.3      13       
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   25          24.9     12       
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   25          25.5     11       
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   25          26.5     10       
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   45          45.8     9        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   45          44.9     8        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   75          74.1     7        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   100         100.9    6        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   125         125.7    5        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   150         150.3    4        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   300         301.5    3        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   300         302.1    2        
75        CTD_cast                  19        9         20070816       1915      23.214    -159.136  4824        nd                                   500         503.1    1