Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.
After the M 6.0 reference event, Quake Pulse counts 1 M4+ event(s) in the first 24 hours and 7 in the first 7 days. Fourteen-day M4.5+ activity is about 2.3× the average equivalent derived from the previous year. The largest secondary event is M 1.1 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.
12 Felt reports · PAGER GREEN · Shallow
| Magnitude | Location | Depth | Time | |
|---|---|---|---|---|
| M 6.0 | 32 km SSW of Honchō, Japan | 41.0 km | 2026-08-23 13:44:53 UTC | View event → |
| M 4.5 | 4 km NNW of Honchō, Japan | 60.4 km | 2026-08-23 16:36:15 UTC | View event → |
| M 4.5 | 99 km ENE of Noda, Japan | 35.0 km | 2026-08-24 18:07:01 UTC | View event → |
| M 4.3 | 10 km SW of Tomakomai, Japan | 132.0 km | 2026-08-24 22:05:02 UTC | View event → |
| M 4.8 | 63 km NE of Kuji, Japan | 63.8 km | 2026-08-27 19:54:41 UTC | View event → |
| M 4.6 | 35 km SSW of Shizunai-furukawachō, Japan | 63.7 km | 2026-08-27 22:13:31 UTC | View event → |
| M 4.4 | 18 km ENE of Kuji, Japan | 67.1 km | 2026-08-28 14:31:46 UTC | View event → |
| M 4.5 | 18 km SW of Urakawa, Japan | 63.6 km | 2026-08-30 00:14:19 UTC | View event → |
| M 4.3 | 36 km S of Shizunai-furukawachō, Japan | 63.9 km | 2026-09-01 17:50:01 UTC | View event → |
| M 4.6 | 78 km ENE of Mutsu, Japan | 74.0 km | 2026-09-01 19:21:23 UTC | View event → |
| M 4.5 | 159 km ENE of Noda, Japan | 33.9 km | 2026-09-05 00:22:45 UTC | View event → |
| M 4.9 | 118 km ENE of Kuji, Japan | 34.4 km | 2026-09-06 05:15:45 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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