Sequence · 2025-10-10

M 7.6 · Observed seismic cluster · Drake Passage

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 cluster22
M6+2
Analysis radius436 km
Observation window14 days
Largest secondary eventM 6.3
Quake Pulse · Major sequence

What the sequence shows

After the M 7.6 reference event, Quake Pulse counts 14 M4+ event(s) in the first 24 hours and 20 in the first 7 days. Fourteen-day M4.5+ activity is about 5.0× the average equivalent derived from the previous year. The largest secondary event is M 1.3 below the reference event.

93/100Sequence score
Events in the previous 24 h0
In the first hour4
In the first 24 hours14
In the first 7 days20
Within 14 days21
Peak one-hour count4

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 d110Average 14-day equivalent4.2Activity / baseline ratio5.0×

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 6.3Magnitude gapM 1.3Observed duration10.2 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.

Detailed timeline

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.

Quake Pulse

Main-event impact

5 Felt reports · PAGER GREEN · Tsunami indicator · Shallow

70/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.6Drake Passage5.6 km2025-10-10 20:29:20 UTCView event →
M 4.9Drake Passage10.0 km2025-10-10 20:51:38 UTCView event →
M 4.6Drake Passage10.0 km2025-10-10 21:00:01 UTCView event →
M 5.0Drake Passage10.0 km2025-10-10 21:13:47 UTCView event →
M 5.7Drake Passage10.0 km2025-10-10 21:28:42 UTCView event →
M 5.4Drake Passage10.0 km2025-10-10 21:34:22 UTCView event →
M 4.8Drake Passage10.0 km2025-10-10 22:09:48 UTCView event →
M 4.7Drake Passage10.0 km2025-10-10 23:00:38 UTCView event →
M 4.6Drake Passage10.0 km2025-10-10 23:09:04 UTCView event →
M 4.6Drake Passage10.0 km2025-10-10 23:54:42 UTCView event →
M 4.5Drake Passage10.0 km2025-10-11 00:32:21 UTCView event →
M 4.7Drake Passage10.0 km2025-10-11 00:46:16 UTCView event →
M 4.6Drake Passage10.0 km2025-10-11 09:42:06 UTCView event →
M 5.0Drake Passage10.0 km2025-10-11 18:29:36 UTCView event →
M 4.9Drake Passage10.0 km2025-10-11 19:05:36 UTCView event →
M 4.6Drake Passage10.0 km2025-10-12 21:23:41 UTCView event →
M 4.6Drake Passage10.0 km2025-10-15 18:35:25 UTCView event →
M 4.7Drake Passage10.0 km2025-10-16 00:34:51 UTCView event →
M 6.3Drake Passage8.0 km2025-10-16 01:42:32 UTCView event →
M 5.2Drake Passage10.0 km2025-10-16 02:45:36 UTCView event →
M 5.1Drake Passage10.0 km2025-10-16 04:49:55 UTCView event →
M 4.5Drake Passage10.0 km2025-10-21 00:34:33 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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