| Observation Date | Latitude | Longitude | Total Ice Concentration | Primary Observer | |
|---|---|---|---|---|---|
| 2018-09-17 00:01:00 UTC | 75.0761 | -140.0244 | 8 | Kazutoshi Sato | |
| 2018-09-16 20:30:00 UTC | 74.9931 | -139.9531 | 8 | Kazutaka Tateyama | |
| 2018-09-16 18:00:00 UTC | 74.7742 | -138.2144 | 8 | Kazutaka Tateyama | |
| 2018-09-16 16:07:00 UTC | 74.6456 | -137.1968 | 10 | Kazutaka Tateyama | |
| 2018-09-16 14:58:00 UTC | 74.6078 | -136.5779 | 10 | HayatoOkuda | |
| 2018-09-16 13:57:00 UTC | 74.562 | -136.1297 | 10 | HayatoOkuda | |
| 2018-09-16 12:58:00 UTC | 74.5093 | -135.6951 | 10 | HayatoOkuda | |
| 2018-09-16 11:57:00 UTC | 74.4701 | -135.3474 | 10 | HayatoOkuda | |
| 2018-09-16 09:58:00 UTC | 74.4771 | -135.3689 | 10 | HayatoOkuda | |
| 2018-09-16 09:01:00 UTC | 74.4239 | -135.2847 | 10 | HayatoOkuda | |
| 2018-09-16 08:02:00 UTC | 74.3194 | -135.0367 | 10 | HayatoOkuda | |
| 2018-09-16 07:00:00 UTC | 74.2264 | -134.7125 | 10 | Kazutoshi Sato | |
| 2018-09-16 06:00:00 UTC | 74.1133 | -134.4458 | 10 | Kazutoshi Sato | |
| 2018-09-16 05:00:00 UTC | 74.0669 | -134.3225 | 10 | Kazutoshi Sato | |
| 2018-09-16 04:00:00 UTC | 74.0072 | -134.1028 | 10 | Kazutoshi Sato | |
| 2018-09-16 03:00:00 UTC | 74.5361 | -135.5797 | 10 | Kazutoshi Sato | |
| 2018-09-16 02:00:00 UTC | 73.975 | -134.0011 | 10 | Kazutoshi Sato | |
| 2018-09-16 01:00:00 UTC | 73.8608 | -133.7031 | 10 | Kazutoshi Sato | |
| 2018-09-16 00:03:00 UTC | 73.7517 | -133.4175 | 10 | Kazutoshi Sato | |
| 2018-09-15 23:08:00 UTC | 73.6529 | -133.1815 | 10 | Kazutaka Tateyama | |
| 2018-09-15 21:58:00 UTC | 73.5645 | -132.8533 | 10 | Kazutaka Tateyama | |
| 2018-09-15 19:00:00 UTC | 73.4886 | -132.6064 | 10 | Kazutoshi Sato | |
| 2018-09-15 15:10:00 UTC | 73.4886 | -133.8304 | 10 | HayatoOkuda | |
| 2018-09-15 13:59:00 UTC | 73.4915 | -134.1832 | 9 | HayatoOkuda | |
| 2018-09-15 12:59:00 UTC | 73.4839 | -134.354 | 7 | HayatoOkuda |