Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.
After the M 7.6 reference event, Quake Pulse counts 5 M4+ event(s) in the first 24 hours and 8 in the first 7 days. Fourteen-day M4.5+ activity is about 1.4× the average equivalent derived from the previous year. The largest secondary event is M 1.9 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.
26 Felt reports · PAGER GREEN · Tsunami indicator · Intermediate
| Magnitude | Location | Depth | Time | |
|---|---|---|---|---|
| M 7.6 | 82 km WNW of Hihifo, Tonga | 210.0 km | 2023-05-10 16:02:00 UTC | View event → |
| M 4.8 | 48 km WNW of Hihifo, Tonga | 175.5 km | 2023-05-10 16:11:36 UTC | View event → |
| M 4.7 | 80 km WNW of Hihifo, Tonga | 165.8 km | 2023-05-10 16:13:39 UTC | View event → |
| M 5.0 | 74 km WNW of Hihifo, Tonga | 198.8 km | 2023-05-10 16:32:40 UTC | View event → |
| M 4.7 | 98 km WNW of Hihifo, Tonga | 222.7 km | 2023-05-10 16:33:52 UTC | View event → |
| M 4.6 | 94 km WNW of Hihifo, Tonga | 211.8 km | 2023-05-10 20:13:35 UTC | View event → |
| M 4.7 | Tonga | 28.5 km | 2023-05-12 13:24:45 UTC | View event → |
| M 4.5 | Fiji region | 565.1 km | 2023-05-14 18:42:48 UTC | View event → |
| M 4.5 | Fiji region | 566.1 km | 2023-05-15 16:41:25 UTC | View event → |
| M 4.5 | 234 km E of Levuka, Fiji | 576.9 km | 2023-05-18 17:29:16 UTC | View event → |
| M 4.6 | 129 km NE of Hihifo, Tonga | 10.0 km | 2023-05-19 10:16:59 UTC | View event → |
| M 5.7 | 104 km SE of Neiafu, Tonga | 16.0 km | 2023-05-21 05:23:11 UTC | View event → |
| M 5.2 | 104 km SE of Neiafu, Tonga | 10.0 km | 2023-05-21 11:26:03 UTC | View event → |
| M 5.0 | 34 km NE of Hihifo, Tonga | 38.7 km | 2023-05-22 13:30:38 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.
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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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