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Sequence · 2025-10-09

M 6.1 · Observed seismic cluster · 121 km E of Ozernovskiy, Russia

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 cluster29
M6+1
Analysis radius196 km
Observation window14 days
Largest secondary eventM 5.8
Quake Pulse · Notable sequence

What the sequence shows

After the M 6.1 reference event, Quake Pulse counts 3 M4+ event(s) in the first 24 hours and 13 in the first 7 days. Fourteen-day M4.5+ activity is about 0.6× the average equivalent derived from the previous year. The largest secondary event is M 0.3 below the reference event.

59/100Sequence score
Events in the previous 24 h2
In the first hour0
In the first 24 hours3
In the first 7 days13
Within 14 days33
Peak one-hour count3

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 d1,344Average 14-day equivalent51.6Activity / baseline ratio0.6×

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 5.8Magnitude gapM 0.3Observed duration13.8 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
121 km E of Ozernovskiy, Russia · 196 kmInteractive 3D view of earthquakes within 196 km of 121 km E of Ozernovskiy, Russia.121 km E of Ozernovskiy, RussiaM 4.6 · 173 km SSE of Vilyuchinsk, Russia · 68.1 kmM 5.6 · 52 km SE of Severo-Kuril’sk, Russia · 190.3 kmM 4.5 · 222 km SE of Vilyuchinsk, Russia · 169.5 km
121 km E of Ozernovskiy, Russia196 km3 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

PAGER GREEN · Shallow

36/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 6.1121 km E of Ozernovskiy, Russia56.5 km2025-10-09 13:28:44 UTCView event →
M 4.6173 km SSE of Vilyuchinsk, Russia25.9 km2025-10-09 15:24:00 UTCView event →
M 5.652 km SE of Severo-Kuril’sk, Russia66.9 km2025-10-10 11:16:01 UTCView event →
M 4.5222 km SE of Vilyuchinsk, Russia10.0 km2025-10-10 11:29:41 UTCView event →
M 5.774 km ENE of Petropavlovsk-Kamchatsky, Russia75.1 km2025-10-11 03:08:44 UTCView event →
M 4.5184 km SE of Vilyuchinsk, Russia10.0 km2025-10-11 09:57:16 UTCView event →
M 5.864 km SE of Severo-Kuril’sk, Russia48.0 km2025-10-11 12:25:56 UTCView event →
M 4.5119 km SE of Petropavlovsk-Kamchatsky, Russia82.3 km2025-10-12 18:10:58 UTCView event →
M 5.1113 km ESE of Ozernovskiy, Russia55.3 km2025-10-13 01:09:45 UTCView event →
M 4.5188 km SSE of Vilyuchinsk, Russia31.6 km2025-10-13 16:27:41 UTCView event →
M 4.584 km SE of Severo-Kuril’sk, Russia35.0 km2025-10-13 17:40:01 UTCView event →
M 4.561 km E of Severo-Kuril’sk, Russia81.6 km2025-10-13 18:50:01 UTCView event →
M 5.0189 km SSE of Vilyuchinsk, Russia10.0 km2025-10-15 05:57:03 UTCView event →
M 4.5134 km S of Vilyuchinsk, Russia54.8 km2025-10-16 03:34:15 UTCView event →
M 4.6128 km SSE of Vilyuchinsk, Russia64.0 km2025-10-16 18:18:25 UTCView event →
M 4.996 km SE of Severo-Kuril’sk, Russia36.4 km2025-10-16 19:56:34 UTCView event →
M 4.6216 km SSE of Vilyuchinsk, Russia10.0 km2025-10-16 20:29:38 UTCView event →
M 5.181 km E of Petropavlovsk-Kamchatsky, Russia68.9 km2025-10-17 01:25:58 UTCView event →
M 4.671 km ENE of Petropavlovsk-Kamchatsky, Russia64.1 km2025-10-17 06:26:45 UTCView event →
M 4.9106 km SE of Severo-Kuril’sk, Russia44.5 km2025-10-17 08:49:13 UTCView event →
M 4.5148 km ESE of Petropavlovsk-Kamchatsky, Russia35.0 km2025-10-18 01:17:26 UTCView event →
M 4.5188 km SE of Vilyuchinsk, Russia10.0 km2025-10-19 06:39:31 UTCView event →
M 5.0176 km ESE of Petropavlovsk-Kamchatsky, Russia10.0 km2025-10-19 07:23:43 UTCView event →
M 4.7170 km SSE of Vilyuchinsk, Russia31.8 km2025-10-19 18:27:57 UTCView event →
M 4.5180 km SSE of Vilyuchinsk, Russia10.0 km2025-10-19 19:55:29 UTCView event →
M 4.983 km E of Petropavlovsk-Kamchatsky, Russia60.6 km2025-10-20 22:43:15 UTCView event →
M 4.6156 km SSE of Vilyuchinsk, Russia58.3 km2025-10-21 19:26:06 UTCView event →
M 5.158 km SE of Vilyuchinsk, Russia68.0 km2025-10-21 23:37:08 UTCView event →
M 4.5186 km SSE of Vilyuchinsk, Russia27.8 km2025-10-22 10:58:28 UTCView event →
M 5.6183 km SSE of Vilyuchinsk, Russia16.0 km2025-10-23 02:31:28 UTCView event →
M 4.7204 km ESE of Ozernovskiy, Russia10.0 km2025-10-23 02:34:39 UTCView event →
M 4.7209 km ESE of Ozernovskiy, Russia10.0 km2025-10-23 02:53:03 UTCView event →
M 4.6164 km SE of Vilyuchinsk, Russia32.3 km2025-10-23 07:03:49 UTCView event →
M 4.5206 km SSE of Vilyuchinsk, Russia10.0 km2025-10-23 09:02:07 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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