Quake Pulse logoQuake Pulse
Sequence · 2011-08-20

M 7.1 · Observed seismic cluster · 64 km S of Port-Vila, Vanuatu

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 cluster70
M6+2
Analysis radius356 km
Observation window14 days
Largest secondary eventM 6.2
Quake Pulse

Sequence timeline

Within first 24 hours15
Within first 7 days46
Observed duration12.7 d
Gap from reference eventM 0.9
0 h12.7 d
Quake Pulse

Main-event impact

23 Felt reports · Shallow

59/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.164 km S of Port-Vila, Vanuatu28.0 km2011-08-20 18:19:23 UTCView event →
M 5.171 km SW of Port-Vila, Vanuatu38.1 km2011-08-20 18:26:45 UTCView event →
M 5.0Vanuatu35.0 km2011-08-20 19:23:03 UTCView event →
M 4.677 km SSW of Port-Vila, Vanuatu35.0 km2011-08-20 19:28:49 UTCView event →
M 4.5117 km SW of Port-Vila, Vanuatu35.0 km2011-08-20 19:55:30 UTCView event →
M 4.967 km SW of Port-Vila, Vanuatu49.3 km2011-08-20 20:13:40 UTCView event →
M 5.152 km SSW of Port-Vila, Vanuatu47.6 km2011-08-20 21:38:21 UTCView event →
M 4.577 km SSW of Port-Vila, Vanuatu35.0 km2011-08-20 21:50:32 UTCView event →
M 5.096 km SW of Port-Vila, Vanuatu35.0 km2011-08-21 00:09:24 UTCView event →
M 5.673 km SW of Port-Vila, Vanuatu35.0 km2011-08-21 00:23:39 UTCView event →
M 5.496 km SSW of Port-Vila, Vanuatu33.4 km2011-08-21 01:24:12 UTCView event →
M 5.596 km S of Port-Vila, Vanuatu35.2 km2011-08-21 02:09:15 UTCView event →
M 5.295 km S of Port-Vila, Vanuatu35.0 km2011-08-21 09:03:49 UTCView event →
M 4.5125 km SW of Port-Vila, Vanuatu35.0 km2011-08-21 10:38:42 UTCView event →
M 4.7102 km SW of Port-Vila, Vanuatu35.0 km2011-08-21 12:58:40 UTCView event →
M 4.844 km SSW of Port-Vila, Vanuatu23.8 km2011-08-21 23:28:49 UTCView event →
M 5.074 km SW of Port-Vila, Vanuatu38.9 km2011-08-22 02:52:25 UTCView event →
M 5.7116 km WNW of Port-Vila, Vanuatu10.0 km2011-08-22 06:04:53 UTCView event →
M 4.596 km WNW of Port-Vila, Vanuatu10.0 km2011-08-22 06:32:41 UTCView event →
M 4.8123 km WNW of Port-Vila, Vanuatu22.9 km2011-08-22 09:55:08 UTCView event →
M 4.672 km W of Port-Vila, Vanuatu31.4 km2011-08-22 15:17:05 UTCView event →
M 5.070 km SSW of Port-Vila, Vanuatu57.2 km2011-08-22 17:39:41 UTCView event →
M 5.1136 km SSW of Port-Vila, Vanuatu35.0 km2011-08-23 17:05:57 UTCView event →
M 4.678 km SSW of Port-Vila, Vanuatu44.0 km2011-08-24 13:46:09 UTCView event →
M 6.277 km SW of Port-Vila, Vanuatu13.0 km2011-08-24 23:06:17 UTCView event →
M 4.982 km SW of Port-Vila, Vanuatu29.2 km2011-08-24 23:29:06 UTCView event →
M 4.698 km SW of Port-Vila, Vanuatu33.6 km2011-08-25 00:05:05 UTCView event →
M 4.5103 km WNW of Port-Vila, Vanuatu35.0 km2011-08-25 06:59:07 UTCView event →
M 5.595 km SW of Port-Vila, Vanuatu35.0 km2011-08-25 14:23:45 UTCView event →
M 5.1131 km SW of Port-Vila, Vanuatu35.0 km2011-08-25 15:16:14 UTCView event →
M 5.0136 km SW of Port-Vila, Vanuatu26.1 km2011-08-25 15:31:10 UTCView event →
M 5.0132 km SW of Port-Vila, Vanuatu32.4 km2011-08-25 16:16:32 UTCView event →
M 4.9119 km SW of Port-Vila, Vanuatu10.0 km2011-08-25 16:18:28 UTCView event →
M 4.7Vanuatu35.0 km2011-08-25 16:21:16 UTCView event →
M 4.7112 km SSW of Port-Vila, Vanuatu35.0 km2011-08-25 17:56:10 UTCView event →
M 4.9141 km SW of Port-Vila, Vanuatu34.2 km2011-08-25 18:21:36 UTCView event →
M 4.6125 km S of Port-Vila, Vanuatu35.0 km2011-08-25 18:39:32 UTCView event →
M 4.5138 km SW of Port-Vila, Vanuatu35.0 km2011-08-26 01:10:19 UTCView event →
M 5.0133 km SW of Port-Vila, Vanuatu46.4 km2011-08-26 11:36:21 UTCView event →
M 4.8158 km SW of Port-Vila, Vanuatu35.0 km2011-08-26 22:01:57 UTCView event →
M 4.5Vanuatu35.0 km2011-08-26 22:32:31 UTCView event →
M 4.5136 km SW of Port-Vila, Vanuatu35.0 km2011-08-27 00:23:25 UTCView event →
M 4.7126 km SW of Port-Vila, Vanuatu35.0 km2011-08-27 05:19:08 UTCView event →
M 4.8120 km WSW of Port-Vila, Vanuatu35.0 km2011-08-27 08:04:55 UTCView event →
M 4.757 km S of Port-Vila, Vanuatu35.0 km2011-08-27 08:52:01 UTCView event →
M 5.149 km S of Port-Vila, Vanuatu68.1 km2011-08-27 12:07:37 UTCView event →
M 4.6130 km WSW of Port-Vila, Vanuatu35.0 km2011-08-27 19:39:08 UTCView event →
M 4.6121 km SW of Port-Vila, Vanuatu35.0 km2011-08-28 05:41:15 UTCView event →
M 4.7Vanuatu35.0 km2011-08-29 13:15:49 UTCView event →
M 4.5139 km SW of Port-Vila, Vanuatu35.0 km2011-08-29 15:24:01 UTCView event →
M 4.7132 km WSW of Port-Vila, Vanuatu35.0 km2011-08-29 15:26:12 UTCView event →
M 4.5133 km SW of Port-Vila, Vanuatu35.0 km2011-08-29 15:34:07 UTCView event →
M 4.7Vanuatu35.0 km2011-08-29 18:09:54 UTCView event →
M 5.662 km ESE of Lakatoro, Vanuatu202.3 km2011-08-29 18:57:39 UTCView event →
M 4.9134 km SW of Port-Vila, Vanuatu35.0 km2011-08-29 20:18:16 UTCView event →
M 4.980 km W of Port-Vila, Vanuatu35.0 km2011-08-29 20:42:15 UTCView event →
M 4.9124 km WSW of Port-Vila, Vanuatu42.8 km2011-08-30 08:20:56 UTCView event →
M 5.261 km SW of Port-Vila, Vanuatu35.0 km2011-08-30 09:14:05 UTCView event →
M 5.361 km SW of Port-Vila, Vanuatu35.0 km2011-08-30 09:16:53 UTCView event →
M 5.154 km SW of Port-Vila, Vanuatu35.0 km2011-08-30 09:26:07 UTCView event →
M 4.8116 km SW of Port-Vila, Vanuatu35.0 km2011-08-30 12:26:08 UTCView event →
M 4.8133 km WSW of Port-Vila, Vanuatu18.6 km2011-08-30 16:59:02 UTCView event →
M 5.067 km SSW of Port-Vila, Vanuatu35.0 km2011-08-30 21:19:06 UTCView event →
M 4.8142 km SSW of Port-Vila, Vanuatu35.0 km2011-08-31 04:01:10 UTCView event →
M 4.9139 km SW of Port-Vila, Vanuatu41.5 km2011-08-31 09:56:21 UTCView event →
M 4.790 km SW of Port-Vila, Vanuatu31.9 km2011-08-31 14:19:03 UTCView event →
M 4.9137 km SSW of Port-Vila, Vanuatu26.2 km2011-08-31 14:23:36 UTCView event →
M 4.9131 km WSW of Port-Vila, Vanuatu44.4 km2011-09-01 12:30:01 UTCView event →
M 5.368 km S of Port-Vila, Vanuatu35.0 km2011-09-01 20:08:51 UTCView event →
M 4.5156 km WSW of Port-Vila, Vanuatu35.0 km2011-09-02 11:23:31 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.

Blog

Latest from the blog

Guides, explainers and practical reading to go beyond the live data.

View all articles →