Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.
After the M 7.8 reference event, Quake Pulse counts 38 M4+ event(s) in the first 24 hours and 54 in the first 7 days. Fourteen-day M4.5+ activity is about 93.6× the average equivalent derived from the previous year. The largest secondary event is M 1.5 below the reference event.
Descriptive comparison with M4.5+ events observed in the same radius during the 365 days before the sequence.
A ratio above 1 means denser M4.5+ activity than the average equivalent derived from the previous 365 days. It is not a risk measure or a forecast.
Earlier events are shown as context only. They are not labelled precursors and should not be interpreted as predictive signals.
Shows M4+ cluster events according to elapsed time after the reference event.
Dots represent M4+ events retained by the sequence detector. Dot size depends on magnitude.
Sequences are descriptive groupings based on spatial and temporal proximity. Quake Pulse does not establish a causal link between every event here and does not provide earthquake forecasts.
1,643 Felt reports · Shallow
| Magnitude | Location | Depth | Time | |
|---|---|---|---|---|
| M 7.8 | 206 km SW of Prince Rupert, Canada | 14.0 km | 2012-10-28 03:04:08 UTC | View event → |
| M 4.6 | 230 km SSW of Prince Rupert, Canada | 20.0 km | 2012-10-28 03:38:10 UTC | View event → |
| M 5.5 | 222 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 03:52:20 UTC | View event → |
| M 5.2 | 236 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 04:25:28 UTC | View event → |
| M 5.1 | 223 km SW of Prince Rupert, Canada | 11.2 km | 2012-10-28 04:26:45 UTC | View event → |
| M 4.7 | 220 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 04:33:41 UTC | View event → |
| M 5.3 | 236 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 04:41:02 UTC | View event → |
| M 4.5 | 242 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 05:02:49 UTC | View event → |
| M 4.5 | 230 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 05:51:17 UTC | View event → |
| M 5.2 | 230 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 06:16:52 UTC | View event → |
| M 4.9 | 274 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 07:12:13 UTC | View event → |
| M 4.9 | 226 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 07:16:37 UTC | View event → |
| M 5.2 | 237 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 07:25:21 UTC | View event → |
| M 5.3 | 256 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 09:17:27 UTC | View event → |
| M 4.6 | 256 km SSW of Prince Rupert, Canada | 15.0 km | 2012-10-28 09:36:35 UTC | View event → |
| M 4.8 | 198 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 09:45:38 UTC | View event → |
| M 4.5 | 228 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 10:23:08 UTC | View event → |
| M 4.6 | 245 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 10:24:15 UTC | View event → |
| M 5.1 | 250 km SW of Prince Rupert, Canada | 25.0 km | 2012-10-28 10:45:48 UTC | View event → |
| M 5.2 | 240 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 11:27:45 UTC | View event → |
| M 5.1 | 256 km SSW of Prince Rupert, Canada | 20.0 km | 2012-10-28 11:53:18 UTC | View event → |
| M 5.1 | 233 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 13:09:14 UTC | View event → |
| M 4.5 | 191 km W of Port McNeill, Canada | 10.0 km | 2012-10-28 14:46:03 UTC | View event → |
| M 4.7 | 225 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 15:59:11 UTC | View event → |
| M 4.5 | 215 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 16:17:03 UTC | View event → |
| M 4.5 | 221 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 17:34:49 UTC | View event → |
| M 6.3 | 237 km SW of Prince Rupert, Canada | 9.0 km | 2012-10-28 18:54:20 UTC | View event → |
| M 5.2 | 246 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 18:57:31 UTC | View event → |
| M 4.9 | 204 km SW of Prince Rupert, Canada | 21.5 km | 2012-10-28 19:02:08 UTC | View event → |
| M 5.4 | 226 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 19:03:21 UTC | View event → |
| M 5.6 | Haida Gwaii, Canada | 10.0 km | 2012-10-28 19:09:53 UTC | View event → |
| M 5.2 | 234 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 19:16:50 UTC | View event → |
| M 4.6 | 252 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 20:02:43 UTC | View event → |
| M 4.6 | 244 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 21:29:04 UTC | View event → |
| M 4.7 | 231 km SW of Prince Rupert, Canada | 14.1 km | 2012-10-28 21:38:20 UTC | View event → |
| M 4.6 | 240 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-28 22:41:27 UTC | View event → |
| M 4.7 | 226 km SW of Prince Rupert, Canada | 10.0 km | 2012-10-28 23:26:50 UTC | View event → |
| M 4.7 | Haida Gwaii, Canada | 10.0 km | 2012-10-28 23:34:23 UTC | View event → |
| M 5.0 | 229 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-29 01:49:01 UTC | View event → |
| M 4.6 | 237 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-29 08:58:30 UTC | View event → |
| M 5.0 | 269 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-29 11:07:15 UTC | View event → |
| M 4.9 | 229 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-29 20:49:46 UTC | View event → |
| M 6.2 | 241 km SSW of Prince Rupert, Canada | 9.0 km | 2012-10-30 02:49:02 UTC | View event → |
| M 5.3 | 261 km SSW of Prince Rupert, Canada | 19.2 km | 2012-10-30 02:55:08 UTC | View event → |
| M 5.0 | 255 km SSW of Prince Rupert, Canada | 23.0 km | 2012-10-30 04:40:15 UTC | View event → |
| M 5.1 | 257 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-30 14:10:59 UTC | View event → |
| M 4.7 | 262 km SSW of Prince Rupert, Canada | 10.0 km | 2012-10-31 04:48:38 UTC | View event → |
| M 5.2 | 226 km SSW of Prince Rupert, Canada | 19.5 km | 2012-11-01 03:16:01 UTC | View event → |
| M 4.6 | 245 km SSW of Prince Rupert, Canada | 10.7 km | 2012-11-01 03:27:13 UTC | View event → |
| M 4.5 | 259 km SSW of Prince Rupert, Canada | 6.1 km | 2012-11-02 07:15:40 UTC | View event → |
| M 5.0 | 278 km SSW of Prince Rupert, Canada | 15.9 km | 2012-11-02 08:19:54 UTC | View event → |
| M 4.8 | 265 km SSW of Prince Rupert, Canada | 10.0 km | 2012-11-02 08:37:10 UTC | View event → |
| M 4.5 | 229 km SSW of Prince Rupert, Canada | 23.1 km | 2012-11-03 04:25:19 UTC | View event → |
| M 4.6 | 276 km SW of Prince Rupert, Canada | 10.0 km | 2012-11-03 12:18:42 UTC | View event → |
| M 4.5 | 253 km SSW of Prince Rupert, Canada | 10.0 km | 2012-11-03 17:49:11 UTC | View event → |
| M 4.5 | 198 km SSW of Prince Rupert, Canada | 10.0 km | 2012-11-04 07:42:16 UTC | View event → |
| M 5.1 | 277 km SSW of Prince Rupert, Canada | 5.0 km | 2012-11-04 12:27:32 UTC | View event → |
| M 4.8 | 243 km SW of Prince Rupert, Canada | 10.0 km | 2012-11-04 18:27:17 UTC | View event → |
| M 4.7 | 232 km SSW of Prince Rupert, Canada | 8.4 km | 2012-11-06 10:27:02 UTC | View event → |
| M 4.5 | 259 km SW of Prince Rupert, Canada | 10.0 km | 2012-11-07 15:04:23 UTC | View event → |
| M 6.1 | 176 km WSW of Vernon, Canada | 13.7 km | 2012-11-08 02:01:50 UTC | View event → |
| M 4.7 | 146 km WSW of Vernon, Canada | 10.0 km | 2012-11-08 21:07:41 UTC | View event → |
Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions. Historical small-earthquake detection varies through time. Long-term comparisons are most robust at higher magnitude thresholds.
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