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Sequence · 2025-11-09

M 6.4 · Observed seismic cluster · 117 km E of Yamada, Japan

Explore clusters of M4.5+ events observed around significant earthquakes. These clusters are descriptive and are not presented as earthquake predictions.

M4.5+ events in cluster47
M6+2
Analysis radius244 km
Observation window14 days
Largest secondary eventM 6.0
Quake Pulse · Major sequence

What the sequence shows

After the M 6.4 reference event, Quake Pulse counts 31 M4+ event(s) in the first 24 hours and 41 in the first 7 days. Fourteen-day M4.5+ activity is about 15.7× the average equivalent derived from the previous year. The largest secondary event is M 0.4 below the reference event.

77/100Sequence score
Events in the previous 24 h17
In the first hour8
In the first 24 hours31
In the first 7 days41
Within 14 days47
Peak one-hour count8

Local historical context

Descriptive comparison with M4.5+ events observed in the same radius during the 365 days before the sequence.

M4.5+ events / 365 d78Average 14-day equivalent3.0Activity / baseline ratio15.7×

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.

Reference event

Largest secondary eventM 6.0Magnitude gapM 0.4Observed duration12.1 d

Earlier events are shown as context only. They are not labelled precursors and should not be interpreted as predictive signals.

Evolving sequence map

Shows M4+ cluster events according to elapsed time after the reference event.

1 hour24 hours7 days14 days
117 km E of Yamada, Japan · 244 kmInteractive 3D view of earthquakes within 244 km of 117 km E of Yamada, Japan.117 km E of Yamada, JapanM 5.4 · 123 km E of Yamada, Japan · 6.5 kmM 4.5 · 129 km E of Miyako, Japan · 21.2 kmM 5.0 · 121 km E of Yamada, Japan · 17.7 kmM 4.6 · 127 km E of Yamada, Japan · 13.0 kmM 4.6 · 105 km E of Yamada, Japan · 16.5 kmM 5.7 · 129 km E of Miyako, Japan · 17.5 kmM 4.6 · 128 km E of Yamada, Japan · 15.2 kmM 5.1 · 132 km E of Yamada, Japan · 20.0 kmM 4.6 · 125 km E of Miyako, Japan · 13.0 kmM 5.2 · 142 km E of Yamada, Japan · 32.1 kmM 4.5 · 132 km E of Yamada, Japan · 16.5 kmM 4.5 · 115 km E of Yamada, Japan · 20.0 kmM 4.5 · 119 km E of Yamada, Japan · 2.4 kmM 4.8 · 116 km E of Miyako, Japan · 36.4 kmM 4.8 · 109 km E of Yamada, Japan · 10.4 kmM 5.0 · 117 km E of Yamada, Japan · 0.5 kmM 4.5 · 131 km E of Yamada, Japan · 16.5 kmM 4.5 · 141 km E of Yamada, Japan · 27.0 kmM 5.1 · 144 km E of Yamada, Japan · 30.9 kmM 4.9 · 113 km E of Miyako, Japan · 19.3 kmM 4.7 · 107 km E of Yamada, Japan · 9.8 kmM 5.3 · 136 km E of Yamada, Japan · 32.9 kmM 4.6 · 133 km E of Miyako, Japan · 30.8 kmM 5.4 · 101 km ESE of Yamada, Japan · 37.9 kmM 4.8 · 126 km E of Yamada, Japan · 23.7 kmM 5.1 · 141 km E of Yamada, Japan · 25.9 kmM 6.0 · 129 km E of Yamada, Japan · 14.5 kmM 4.7 · 140 km E of Yamada, Japan · 24.2 kmM 4.5 · 120 km E of Yamada, Japan · 5.4 kmM 4.6 · 139 km E of Yamada, Japan · 23.7 kmM 4.6 · 135 km E of Miyako, Japan · 24.1 km
117 km E of Yamada, Japan244 km31 Recent earthquakes

Detailed timeline

Dots represent M4+ events retained by the sequence detector. Dot size depends on magnitude.

0 h24 h7 d14 d

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.

Quake Pulse

Main-event impact

13 Felt reports · PAGER GREEN · Shallow

46/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.4117 km E of Yamada, Japan10.0 km2025-11-09 08:54:36 UTCView event →
M 5.4123 km E of Yamada, Japan10.0 km2025-11-09 09:10:47 UTCView event →
M 4.5129 km E of Miyako, Japan10.0 km2025-11-09 09:15:23 UTCView event →
M 5.0121 km E of Yamada, Japan10.0 km2025-11-09 09:16:57 UTCView event →
M 4.6127 km E of Yamada, Japan10.0 km2025-11-09 09:21:34 UTCView event →
M 4.6105 km E of Yamada, Japan10.0 km2025-11-09 09:24:02 UTCView event →
M 5.7129 km E of Miyako, Japan10.0 km2025-11-09 09:28:24 UTCView event →
M 4.6128 km E of Yamada, Japan10.0 km2025-11-09 09:35:45 UTCView event →
M 5.1132 km E of Yamada, Japan10.0 km2025-11-09 09:52:43 UTCView event →
M 4.6125 km E of Miyako, Japan10.0 km2025-11-09 10:25:03 UTCView event →
M 5.2142 km E of Yamada, Japan10.0 km2025-11-09 11:11:24 UTCView event →
M 4.5132 km E of Yamada, Japan10.0 km2025-11-09 12:06:20 UTCView event →
M 4.5115 km E of Yamada, Japan10.0 km2025-11-09 12:15:47 UTCView event →
M 4.5119 km E of Yamada, Japan10.0 km2025-11-09 13:50:16 UTCView event →
M 4.8116 km E of Miyako, Japan40.1 km2025-11-09 14:41:17 UTCView event →
M 4.8109 km E of Yamada, Japan10.0 km2025-11-09 15:44:22 UTCView event →
M 5.0117 km E of Yamada, Japan10.0 km2025-11-09 15:46:46 UTCView event →
M 4.5131 km E of Yamada, Japan10.0 km2025-11-09 15:58:08 UTCView event →
M 4.5141 km E of Yamada, Japan10.0 km2025-11-09 16:42:27 UTCView event →
M 5.1144 km E of Yamada, Japan15.4 km2025-11-09 22:04:14 UTCView event →
M 4.9113 km E of Miyako, Japan10.0 km2025-11-09 22:41:28 UTCView event →
M 4.7107 km E of Yamada, Japan10.0 km2025-11-10 00:40:05 UTCView event →
M 5.3136 km E of Yamada, Japan9.1 km2025-11-10 01:20:51 UTCView event →
M 4.6133 km E of Miyako, Japan10.0 km2025-11-10 01:55:11 UTCView event →
M 5.4101 km ESE of Yamada, Japan10.0 km2025-11-10 03:00:18 UTCView event →
M 4.8126 km E of Yamada, Japan17.7 km2025-11-10 06:18:40 UTCView event →
M 5.1141 km E of Yamada, Japan10.0 km2025-11-10 07:22:15 UTCView event →
M 6.0129 km E of Yamada, Japan11.0 km2025-11-10 07:23:17 UTCView event →
M 4.7140 km E of Yamada, Japan31.8 km2025-11-10 07:42:50 UTCView event →
M 4.5120 km E of Yamada, Japan10.0 km2025-11-10 08:24:05 UTCView event →
M 4.6139 km E of Yamada, Japan10.0 km2025-11-10 08:24:46 UTCView event →
M 4.6135 km E of Miyako, Japan10.0 km2025-11-10 08:37:21 UTCView event →
M 5.1111 km E of Yamada, Japan13.7 km2025-11-10 09:58:59 UTCView event →
M 4.5147 km E of Yamada, Japan10.0 km2025-11-10 20:44:14 UTCView event →
M 4.5107 km E of Miyako, Japan36.5 km2025-11-11 12:03:08 UTCView event →
M 5.3111 km E of Miyako, Japan35.0 km2025-11-12 00:29:22 UTCView event →
M 4.9139 km E of Miyako, Japan10.0 km2025-11-12 03:57:39 UTCView event →
M 4.6117 km E of Yamada, Japan10.0 km2025-11-12 19:08:54 UTCView event →
M 4.5113 km E of Miyako, Japan31.6 km2025-11-13 07:22:52 UTCView event →
M 5.2137 km E of Yamada, Japan10.0 km2025-11-13 19:58:01 UTCView event →
M 4.696 km E of Tomioka, Japan31.7 km2025-11-14 17:34:54 UTCView event →
M 4.7110 km E of Miyako, Japan29.6 km2025-11-15 18:06:23 UTCView event →
M 4.5134 km E of Miyako, Japan10.0 km2025-11-16 13:19:33 UTCView event →
M 5.2110 km E of Miyako, Japan17.6 km2025-11-17 19:06:33 UTCView event →
M 4.551 km ESE of Kamaishi, Japan42.8 km2025-11-18 02:05:51 UTCView event →
M 4.9110 km NE of Kuji, Japan44.2 km2025-11-18 08:21:21 UTCView event →
M 5.0132 km ESE of Yamada, Japan10.0 km2025-11-19 02:23:19 UTCView event →
M 5.5133 km E of Miyako, Japan11.0 km2025-11-21 12:22:04 UTCView event →

Interpretation

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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