| Observation Date | Latitude | Longitude | Total Ice Concentration | Primary Observer | |
|---|---|---|---|---|---|
| 2018-09-15 11:59:00 UTC | 73.4851 | -134.3498 | 5 | HayatoOkuda | |
| 2018-09-15 11:00:00 UTC | 73.4913 | -134.3666 | 3 | HayatoOkuda | |
| 2018-09-15 10:01:00 UTC | 73.5301 | -134.7561 | 9 | HayatoOkuda | |
| 2018-09-15 09:00:00 UTC | 73.5654 | -135.168 | 8 | HayatoOkuda | |
| 2018-09-15 07:54:00 UTC | 73.6197 | -135.6294 | 7 | HayatoOkuda | |
| 2018-09-15 07:01:00 UTC | 73.6444 | -135.9867 | 8 | Kazutoshi Sato | |
| 2018-09-15 05:56:00 UTC | 73.6861 | -136.4539 | 10 | Kazutoshi Sato | |
| 2018-09-15 05:00:00 UTC | 73.7189 | -136.8333 | 10 | Kazutoshi Sato | |
| 2018-09-15 03:58:00 UTC | 73.7525 | -137.2814 | 10 | Kazutoshi Sato | |
| 2018-09-15 03:00:00 UTC | 73.8269 | -137.9994 | 0 | Kazutoshi Sato | |
| 2018-09-15 02:00:00 UTC | 73.8819 | -138.8445 | 0 | Kazutoshi Sato |