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Sequence · 2013-08-30

M 7.0 · Observed seismic cluster · 101 km SW of Atka, Alaska

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 cluster56
M6+4
Analysis radius340 km
Observation window14 days
Largest secondary eventM 6.5
Quake Pulse

Sequence timeline

Within first 24 hours22
Within first 7 days51
Observed duration13.0 d
Gap from reference eventM 0.5
0 h13.0 d
Quake Pulse

Main-event impact

9 Felt reports · PAGER GREEN · Shallow

57/100
Impact and context →

M4.5+ events in cluster

MagnitudeLocationDepthTime
M 7.0101 km SW of Atka, Alaska29.0 km2013-08-30 16:25:02 UTCView event →
M 5.5109 km SW of Atka, Alaska7.3 km2013-08-30 16:29:05 UTCView event →
M 4.7106 km SW of Atka, Alaska26.9 km2013-08-30 16:45:39 UTCView event →
M 4.5105 km ESE of Adak, Alaska35.0 km2013-08-30 18:52:41 UTCView event →
M 4.999 km SSW of Atka, Alaska23.0 km2013-08-30 20:09:32 UTCView event →
M 4.6112 km SSW of Atka, Alaska23.7 km2013-08-30 20:23:09 UTCView event →
M 4.6105 km SSW of Atka, Alaska20.2 km2013-08-30 20:47:10 UTCView event →
M 5.096 km SW of Atka, Alaska25.4 km2013-08-30 21:55:42 UTCView event →
M 5.4108 km SW of Atka, Alaska25.6 km2013-08-31 00:07:28 UTCView event →
M 4.8111 km SSW of Atka, Alaska3.7 km2013-08-31 01:57:55 UTCView event →
M 4.8102 km SSW of Atka, Alaska28.6 km2013-08-31 06:31:09 UTCView event →
M 4.5111 km SSW of Atka, Alaska4.8 km2013-08-31 06:33:12 UTCView event →
M 6.0118 km SSW of Atka, Alaska18.0 km2013-08-31 06:38:36 UTCView event →
M 5.2115 km SSW of Atka, Alaska10.3 km2013-08-31 06:40:56 UTCView event →
M 4.9122 km SSW of Atka, Alaska12.5 km2013-08-31 06:43:30 UTCView event →
M 5.5109 km ESE of Adak, Alaska25.2 km2013-08-31 06:43:54 UTCView event →
M 4.8115 km SSW of Atka, Alaska11.4 km2013-08-31 07:04:02 UTCView event →
M 5.2104 km SSW of Atka, Alaska23.2 km2013-08-31 07:30:26 UTCView event →
M 5.2109 km SSW of Atka, Alaska8.5 km2013-08-31 09:50:51 UTCView event →
M 5.0110 km SSW of Atka, Alaska4.4 km2013-08-31 09:54:12 UTCView event →
M 5.2108 km SSW of Atka, Alaska5.1 km2013-08-31 10:06:13 UTCView event →
M 4.7108 km SSW of Atka, Alaska21.8 km2013-08-31 10:07:46 UTCView event →
M 4.8109 km ESE of Adak, Alaska35.2 km2013-08-31 18:59:52 UTCView event →
M 5.2104 km SW of Atka, Alaska32.4 km2013-08-31 19:01:38 UTCView event →
M 4.5123 km SE of Adak, Alaska24.5 km2013-09-02 09:58:58 UTCView event →
M 4.7120 km SSW of Atka, Alaska35.0 km2013-09-02 15:54:48 UTCView event →
M 4.5111 km SE of Adak, Alaska25.7 km2013-09-02 18:14:42 UTCView event →
M 4.9133 km SW of Adak, Alaska25.8 km2013-09-02 22:48:56 UTCView event →
M 4.5142 km WSW of Adak, Alaska25.2 km2013-09-04 00:43:12 UTCView event →
M 6.581 km SSW of Atka, Alaska20.0 km2013-09-04 02:32:30 UTCView event →
M 4.767 km SW of Atka, Alaska8.9 km2013-09-04 02:35:50 UTCView event →
M 4.699 km SSW of Atka, Alaska25.3 km2013-09-04 03:06:20 UTCView event →
M 5.890 km SSW of Atka, Alaska26.6 km2013-09-04 04:16:30 UTCView event →
M 5.294 km SSW of Atka, Alaska11.4 km2013-09-04 05:15:52 UTCView event →
M 5.780 km SSW of Atka, Alaska21.0 km2013-09-04 06:16:49 UTCView event →
M 6.082 km SSW of Atka, Alaska17.0 km2013-09-04 06:27:03 UTCView event →
M 5.286 km SSW of Atka, Alaska30.9 km2013-09-04 06:54:15 UTCView event →
M 4.789 km SSW of Atka, Alaska25.7 km2013-09-04 08:16:54 UTCView event →
M 4.7104 km SSW of Atka, Alaska28.5 km2013-09-04 09:16:29 UTCView event →
M 4.894 km SSW of Atka, Alaska30.1 km2013-09-04 18:57:24 UTCView event →
M 4.791 km SSW of Atka, Alaska25.6 km2013-09-04 23:54:03 UTCView event →
M 5.685 km SSW of Atka, Alaska20.0 km2013-09-05 05:43:39 UTCView event →
M 4.5100 km SSW of Atka, Alaska22.8 km2013-09-05 06:38:56 UTCView event →
M 4.9105 km SSW of Atka, Alaska26.5 km2013-09-05 07:44:05 UTCView event →
M 5.095 km S of Atka, Alaska25.3 km2013-09-05 09:34:22 UTCView event →
M 4.6104 km S of Atka, Alaska3.0 km2013-09-05 09:49:15 UTCView event →
M 5.185 km SSW of Atka, Alaska25.2 km2013-09-05 10:09:26 UTCView event →
M 4.789 km SSW of Atka, Alaska25.5 km2013-09-05 10:57:15 UTCView event →
M 4.698 km SSW of Atka, Alaska7.1 km2013-09-05 11:22:57 UTCView event →
M 4.697 km S of Atka, Alaska20.3 km2013-09-06 01:27:48 UTCView event →
M 4.798 km SSW of Atka, Alaska23.9 km2013-09-06 08:39:22 UTCView event →
M 4.8109 km S of Atka, Alaska17.2 km2013-09-07 13:12:18 UTCView event →
M 4.8102 km S of Atka, Alaska26.7 km2013-09-07 15:51:40 UTCView event →
M 4.888 km SSW of Atka, Alaska24.1 km2013-09-08 11:20:44 UTCView event →
M 4.9103 km ESE of Adak, Alaska10.0 km2013-09-09 13:20:12 UTCView event →
M 5.1209 km SW of Nikolski, Alaska40.5 km2013-09-12 15:25:23 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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