| Observation Date | Latitude | Longitude | Total Ice Concentration | Primary Observer | |
|---|---|---|---|---|---|
| 2018-09-30 13:07:00 UTC | 70.5825 | -132.295 | 10 | Kazutaka Tateyama | |
| 2018-09-30 12:05:00 UTC | 70.5733 | -132.5067 | 10 | Kazutaka Tateyama | |
| 2018-09-30 11:00:00 UTC | 70.5178 | -132.7453 | 10 | Kazutaka Tateyama | |
| 2018-09-30 10:02:00 UTC | 70.5058 | -133.1428 | 10 | Kazutaka Tateyama | |
| 2018-09-30 09:03:00 UTC | 70.4803 | -133.5103 | 10 | Kazutaka Tateyama | |
| 2018-09-30 08:09:00 UTC | 70.4664 | -133.8478 | 10 | Kazutaka Tateyama | |
| 2018-09-30 07:00:00 UTC | 70.4875 | -133.9906 | 10 | Kazutaka Tateyama | |
| 2018-09-30 06:02:00 UTC | 70.4333 | -134.3139 | 10 | HayatoOkuda | |
| 2018-09-30 04:58:00 UTC | 70.3833 | -134.7333 | 5 | HayatoOkuda | |
| 2018-09-30 04:00:00 UTC | 70.35 | -135.1833 | 8 | HayatoOkuda | |
| 2018-09-30 01:57:00 UTC | 70.3786 | -136.2428 | 7 | Kazutaka Tateyama | |
| 2018-09-30 01:02:00 UTC | 70.4333 | -136.7536 | 6 | HayatoOkuda | |
| 2018-09-30 00:04:00 UTC | 70.5 | -137.4167 | 10 | HayatoOkuda | |
| 2018-09-29 23:00:00 UTC | 70.4915 | -137.4685 | 10 | Kazutoshi Sato | |
| 2018-09-28 07:18:00 UTC | 72.1667 | -146.5833 | 1 | HayatoOkuda | |
| 2018-09-28 06:10:00 UTC | 72.2167 | -147.1167 | 0 | HayatoOkuda | |
| 2018-09-28 04:56:00 UTC | 72.1 | -147.8333 | 1 | HayatoOkuda | |
| 2018-09-28 03:37:00 UTC | 72.0124 | -148.6028 | 2 | HayatoOkuda | |
| 2018-09-23 06:27:00 UTC | 77.2719 | -149.9725 | 0 | Kazutaka Tateyama | |
| 2018-09-23 05:05:00 UTC | 77.54 | -149.8864 | 8 | Kazutaka Tateyama | |
| 2018-09-23 04:23:00 UTC | 77.6372 | -149.9336 | 8 | Kazutaka Tateyama | |
| 2018-09-23 03:12:00 UTC | 77.8014 | -149.8631 | 8 | Kazutaka Tateyama | |
| 2018-09-23 02:17:00 UTC | 77.9147 | -149.9097 | 8 | Kazutaka Tateyama | |
| 2018-09-22 20:05:00 UTC | 78.0009 | -149.9433 | 9 | HayatoOkuda | |
| 2018-09-22 19:05:00 UTC | 77.9838 | -150.0151 | 10 | HayatoOkuda |