| Date | Magnitude | Location |
| 1999-12-24 | M=5.0 Mw | felt | 35 km SW of Ucluelet, BC |
| 1999-12-11 | M=4.9 Mw | felt | 12 km NE of Victoria, BC |
| 1999-12-06 | M=5.7 ML | | 99 km SW of Mould Bay, NT |
| 1999-11-26 | M=3.8 MN | felt | 23 km SE of Scarborough, ON |
| 1999-11-02 | M=4.5 ML | | 212 km SW of Grand Bank, NL |
| 1999-10-31 | M=4.2 MN | felt | 21 km SW of Sainte-Agathe, QC |
| 1999-09-11 | M=5.0 ML | felt | 61 km SE of Haines Junction, YT |
| 1999-07-29 | M=5.3 ML | | 371 km SE of Resolution Island, NU |
| 1999-07-25 | M=4.7 mbLg | | 126 km SW of Wrigley, NT |
| 1999-07-02 | M=4.9 ML | felt | 82 km SW of Tacoma, WA |
| 1999-07-02 | M=5.7 Ms | | 191 km SW of Port Alice, BC |
| 1999-06-28 | M=4.9 Mw | | 217 km SW of Port Alice, BC |
| 1999-06-18 | M=3.5 MN | felt | 18 km NW of L'Annonciation, QC |
| 1999-05-27 | M=5.7 Mw | felt | 125 km SW of Skagway, AK |
| 1999-05-14 | M=3.0 MN | felt | 29 km NE of Temiscaming, QC |
| 1999-05-11 | M=5.0 ML | | 115 km SE of Ross River, YT |
| 1999-05-08 | M=3.8 ML | felt | 16 km NW of Tofino, BC |
| 1999-04-17 | M=4.1 MLSn | | 196 km SW of Port Hardy, BC |
| 1999-04-06 | M=3.6 MN | | 88 km SW of Kimmirut, NU |
| 1999-04-03 | M=3.1 MN | | 147 km NE of Fort Ross, NU |
| 1999-04-03 | M=3.3 ML | felt | 11 km SE of Victoria, BC |
| 1999-04-01 | M=4.0 ML | | 119 km SW of Skagway, AK |
| 1999-03-25 | M=3.0 MN | felt | 44 km NW of Hawkesbury, ON |
| 1999-03-16 | M=3.5 MN | | 56 km NE of Sainte-Anne-des-Monts, QC |
| 1999-03-16 | M=5.1 MN | felt | 54 km NE of Sainte-Anne-des-Monts, QC |
| 1999-03-06 | M=3.8 ML | | 43 km NE of Queen Charlotte City, BC |
| 1999-03-02 | M=4.0 MN | | 190 km NE of Polaris, NU |
| 1999-02-21 | M=4.2 ML | | 197 km NE of Clyde River, NU |
| 1999-02-01 | M=3.4 MN | felt | 21 km NE of Cochrane, ON |
| 1999-01-21 | M=3.5 MN | felt | 42 km SW of Sainte-Anne-des-Monts, QC |
| 1999-01-21 | M=3.0 ML | felt | 20 km SW of Gibsons, BC |
| 1999-01-19 | M=3.0 MN | felt | 18 km SW of Rigaud, QC |
| 1999-01-04 | M=4.2 ML | felt | 81 km SW of Skagway, AK |
| 1999-01-01 | M=5.3 mb | | 183 km NW of Isachsen, NU |