Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.
35 Felt reports · PAGER GREEN · Tsunami indicator · Shallow
| Magnitude | Location | Depth | Time | |
|---|---|---|---|---|
| M 6.8 | 97 km NE of Hihifo, Tonga | 10.0 km | 2017-11-04 09:00:19 UTC | View event → |
| M 5.1 | 145 km NE of Hihifo, Tonga | 10.0 km | 2017-11-04 12:18:22 UTC | View event → |
| M 5.0 | 118 km NNE of Hihifo, Tonga | 10.0 km | 2017-11-04 14:36:05 UTC | View event → |
| M 5.6 | 98 km NNE of Hihifo, Tonga | 10.0 km | 2017-11-04 15:24:32 UTC | View event → |
| M 4.6 | 124 km NNE of Hihifo, Tonga | 10.0 km | 2017-11-04 15:42:48 UTC | View event → |
| M 4.8 | 110 km NNE of Hihifo, Tonga | 10.0 km | 2017-11-04 16:23:42 UTC | View event → |
| M 4.6 | 117 km NE of Hihifo, Tonga | 10.0 km | 2017-11-04 20:11:35 UTC | View event → |
| M 4.6 | 82 km NE of Hihifo, Tonga | 10.0 km | 2017-11-05 22:25:15 UTC | View event → |
| M 5.4 | 87 km ENE of Hihifo, Tonga | 10.0 km | 2017-11-06 06:36:00 UTC | View event → |
| M 4.6 | 83 km NW of Hihifo, Tonga | 156.1 km | 2017-11-09 19:46:50 UTC | View event → |
| M 4.9 | 102 km NNE of Hihifo, Tonga | 17.0 km | 2017-11-13 15:54:28 UTC | View event → |
| M 5.3 | 146 km NNW of Neiafu, Tonga | 156.5 km | 2017-11-15 05:00:39 UTC | View event → |
| M 4.7 | 32 km SW of Hihifo, Tonga | 98.8 km | 2017-11-16 12:33:38 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.
Guides, explainers and practical reading to go beyond the live data.
Magnitude is only one part of the story. Depth, distance, local ground conditions and building vulnerability help explain why shaking can differ so much from one earthquake to another.
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Earthquake-resistant design is not about making buildings immovable. It is about controlling forces, deformation and failure so people have a much better chance of staying safe.
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Early-warning systems detect an earthquake after it starts and try to send an alert before the strongest shaking arrives. The difference between warning and prediction matters.
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