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 6 M4+ event(s) in the first 24 hours and 11 in the first 7 days. Fourteen-day M4.5+ activity is about 1.6× the average equivalent derived from the previous year. The largest secondary event is M 1.0 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.
1,027 Felt reports · Intermediate
| Magnitude | Location | Depth | Time | |
|---|---|---|---|---|
| M 7.6 | 30 km WSW of Pariaman, Indonesia | 81.0 km | 2009-09-30 10:16:09 UTC | View event → |
| M 5.4 | 12 km S of Pariaman, Indonesia | 83.3 km | 2009-09-30 10:38:51 UTC | View event → |
| M 4.5 | 118 km WSW of Padang, Indonesia | 10.0 km | 2009-09-30 21:19:29 UTC | View event → |
| M 4.5 | 98 km WSW of Padang, Indonesia | 10.0 km | 2009-10-01 00:25:55 UTC | View event → |
| M 6.6 | 49 km SSE of Sungai Penuh, Indonesia | 9.0 km | 2009-10-01 01:52:27 UTC | View event → |
| M 5.3 | 39 km S of Sungai Penuh, Indonesia | 10.0 km | 2009-10-01 02:20:30 UTC | View event → |
| M 4.8 | 44 km SE of Sungai Penuh, Indonesia | 10.0 km | 2009-10-01 03:40:22 UTC | View event → |
| M 4.5 | 60 km SSE of Sungai Penuh, Indonesia | 10.0 km | 2009-10-02 10:24:16 UTC | View event → |
| M 4.5 | 59 km SE of Sungai Penuh, Indonesia | 10.0 km | 2009-10-02 14:54:06 UTC | View event → |
| M 4.5 | 11 km E of Padang, Indonesia | 74.3 km | 2009-10-02 15:08:46 UTC | View event → |
| M 4.8 | 34 km SW of Pariaman, Indonesia | 93.7 km | 2009-10-05 12:51:03 UTC | View event → |
| M 4.6 | 14 km S of Pariaman, Indonesia | 90.2 km | 2009-10-07 03:19:01 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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