Sequence · 2002-03-05

M 7.5 · Observed seismic cluster · Mindanao, Philippines

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 cluster39
M6+2
Analysis radius420 km
Observation window14 days
Largest secondary eventM 6.0
Quake Pulse · Major sequence

What the sequence shows

After the M 7.5 reference event, Quake Pulse counts 22 M4+ event(s) in the first 24 hours and 35 in the first 7 days. Fourteen-day M4.5+ activity is about 8.9× the average equivalent derived from the previous year. The largest secondary event is M 1.5 below the reference event.

90/100Sequence score
Events in the previous 24 h1
In the first hour4
In the first 24 hours22
In the first 7 days35
Within 14 days38
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 d111Average 14-day equivalent4.3Activity / baseline ratio8.9×

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 1.5Observed duration9.5 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

Shallow

55/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.5Mindanao, Philippines31.0 km2002-03-05 21:16:09 UTCView event →
M 5.014 km WSW of Malisbeng, Philippines33.0 km2002-03-05 21:39:10 UTCView event →
M 5.310 km W of Palimbang, Philippines33.0 km2002-03-05 21:48:26 UTCView event →
M 4.62 km NE of Palimbang, Philippines33.0 km2002-03-05 22:06:11 UTCView event →
M 4.65 km WSW of Malisbeng, Philippines33.0 km2002-03-05 22:11:48 UTCView event →
M 4.511 km NNW of Malisbeng, Philippines33.0 km2002-03-05 22:34:00 UTCView event →
M 4.512 km SSW of Maitum, Philippines33.0 km2002-03-05 23:01:26 UTCView event →
M 4.76 km SSW of Maitum, Philippines33.0 km2002-03-06 01:21:33 UTCView event →
M 4.642 km SSW of Maguling, Philippines33.0 km2002-03-06 01:34:50 UTCView event →
M 4.787 km ESE of Caburan, Philippines33.0 km2002-03-06 03:25:04 UTCView event →
M 4.911 km SW of Maitum, Philippines33.0 km2002-03-06 04:08:49 UTCView event →
M 4.520 km WNW of Palimbang, Philippines33.0 km2002-03-06 05:10:27 UTCView event →
M 4.514 km SSE of Sangay, Philippines33.0 km2002-03-06 05:14:18 UTCView event →
M 4.720 km SSW of Tambilil, Philippines33.0 km2002-03-06 05:38:08 UTCView event →
M 4.67 km NNE of Lumazal, Philippines33.0 km2002-03-06 05:39:24 UTCView event →
M 4.655 km SSW of Maitum, Philippines33.0 km2002-03-06 07:02:12 UTCView event →
M 5.03 km W of Lianga, Philippines82.8 km2002-03-06 07:27:05 UTCView event →
M 4.512 km SSW of Maitum, Philippines33.0 km2002-03-06 08:34:16 UTCView event →
M 4.512 km SSW of Maan, Philippines33.0 km2002-03-06 13:02:37 UTCView event →
M 5.45 km SSW of Katubao, Philippines33.0 km2002-03-06 14:36:55 UTCView event →
M 4.518 km S of Maasim, Philippines33.0 km2002-03-06 18:32:56 UTCView event →
M 5.129 km SSW of Tambilil, Philippines33.0 km2002-03-06 19:19:52 UTCView event →
M 4.863 km SE of Lukatan, Philippines33.0 km2002-03-06 20:26:46 UTCView event →
M 4.824 km SSW of Maitum, Philippines33.0 km2002-03-07 03:30:04 UTCView event →
M 4.75 km SW of Nalus, Philippines33.0 km2002-03-07 10:37:17 UTCView event →
M 4.50 km W of Tambilil, Philippines33.0 km2002-03-07 13:56:36 UTCView event →
M 4.927 km SW of Mabay, Philippines24.5 km2002-03-07 23:59:33 UTCView event →
M 4.922 km SSW of Maitum, Philippines33.0 km2002-03-08 00:07:55 UTCView event →
M 4.720 km SSW of Maitum, Philippines33.0 km2002-03-08 00:37:19 UTCView event →
M 4.611 km E of Kinablangan, Philippines33.0 km2002-03-08 00:44:17 UTCView event →
M 4.710 km SW of Nalus, Philippines33.0 km2002-03-08 01:05:52 UTCView event →
M 6.028 km SSW of Maguling, Philippines23.3 km2002-03-08 18:27:53 UTCView event →
M 5.417 km SW of Mabay, Philippines33.0 km2002-03-08 19:08:25 UTCView event →
M 4.816 km SW of Maitum, Philippines33.0 km2002-03-08 19:35:49 UTCView event →
M 4.65 km WSW of Nalus, Philippines33.0 km2002-03-10 13:44:08 UTCView event →
M 4.612 km SSW of Mabay, Philippines33.0 km2002-03-12 19:47:43 UTCView event →
M 4.782 km ESE of Bobon, Philippines87.5 km2002-03-14 06:12:49 UTCView event →
M 4.64 km NW of Nuing, Philippines227.4 km2002-03-15 02:17:38 UTCView event →
M 4.536 km SSW of Palimbang, Philippines33.0 km2002-03-15 08:30:38 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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