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Fri Aug 13, 2021, 02:28 PM

Massive, powerful earthquake storm near South Georgia and South Sandwich Islands

See: https://earthquake.usgs.gov/earthquakes/map/?currentFeatureId=us6000f4mr&extent=-66.96448,-406.58203&extent=-48.40003,-364.39453&listOnlyShown=true&baseLayer=terrain

I scan the USGS earthquake page each day a part of my weather review and in the years I've been observing, never seen a swarm this powerful and sustained. Would not want to be existing in that area and shudder to think what this would do in a highly populated zone.

Screenshot...


From Wikipedia:

South Georgia and the South Sandwich Islands (SGSSI) is a British Overseas Territory in the southern Atlantic Ocean. It is a remote and inhospitable collection of islands, consisting of South Georgia Island and a chain of smaller islands known as the South Sandwich Islands. South Georgia is 165 kilometres (103 mi) long and 35 kilometres (22 mi) wide and is by far the largest island in the territory. The South Sandwich Islands lie about 700 kilometres (430 mi) southeast of South Georgia. The territory's total land area is 3,903 km2 (1,507 sq mi). The Falkland Islands are about 1,300 kilometres (810 mi) west from its nearest point.

No permanent native population lives in the South Sandwich Islands, and a very small non-permanent population resides on South Georgia. There are no scheduled passenger flights or ferries to or from the territory, although visits by cruise liners to South Georgia are increasingly popular, with several thousand visitors each summer.


Data (scroll down to see the big one at 7.5 magnitude):

USGS Magnitude 2.5+ Earthquakes, Past Day
67 of 117 earthquakes in map area.


5.0 South Sandwich Islands region
2021-08-13 05:01:24 (UTC-04:00)
35.0 km

5.1 South Sandwich Islands region
2021-08-13 04:46:29 (UTC-04:00)
53.5 km

5.2 South Sandwich Islands region
2021-08-13 04:33:13 (UTC-04:00)
10.0 km

5.0 South Sandwich Islands region
2021-08-13 04:25:00 (UTC-04:00)
54.8 km

5.0 South Sandwich Islands region
2021-08-13 03:13:56 (UTC-04:00)
37.1 km

5.2 South Sandwich Islands region
2021-08-13 03:08:37 (UTC-04:00)
10.0 km

5.2 South Sandwich Islands region
2021-08-13 03:04:34 (UTC-04:00)
10.0 km

5.0 South Sandwich Islands region
2021-08-13 02:41:46 (UTC-04:00)
66.8 km

5.0 South Sandwich Islands region
2021-08-13 02:34:34 (UTC-04:00)
10.0 km

5.5 South Sandwich Islands region
2021-08-13 02:14:11 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-13 01:44:04 (UTC-04:00)
45.3 km

5.0 South Sandwich Islands region
2021-08-13 01:41:24 (UTC-04:00)
45.8 km

5.5 South Sandwich Islands region
2021-08-13 01:24:58 (UTC-04:00)
31.6 km

5.3 South Sandwich Islands region
2021-08-13 01:24:04 (UTC-04:00)
58.7 km

5.3 South Sandwich Islands region
2021-08-13 00:53:09 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-13 00:03:58 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-12 23:53:21 (UTC-04:00)
35.0 km

5.7 South Sandwich Islands region
2021-08-12 23:43:19 (UTC-04:00)
66.2 km

5.1 South Sandwich Islands region
2021-08-12 23:38:23 (UTC-04:00)
10.0 km

4.5 62 km W of San Antonio de los Cobres, Argentina
2021-08-12 23:14:21 (UTC-04:00)
197.8 km

4.6 South Sandwich Islands region
2021-08-12 22:57:27 (UTC-04:00)
10.0 km

5.2 South Sandwich Islands region
2021-08-12 22:33:40 (UTC-04:00)
10.0 km

4.9 South Sandwich Islands region
2021-08-12 22:29:33 (UTC-04:00)
25.4 km

5.3 South Sandwich Islands region
2021-08-12 21:47:37 (UTC-04:00)
10.0 km

4.9 South Sandwich Islands region
2021-08-12 21:39:15 (UTC-04:00)
46.1 km

5.0 South Sandwich Islands region
2021-08-12 21:26:41 (UTC-04:00)
31.1 km

4.6 South Sandwich Islands region
2021-08-12 21:08:59 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-12 20:46:19 (UTC-04:00)
10.0 km

5.0 South Sandwich Islands region
2021-08-12 20:42:25 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-12 20:04:15 (UTC-04:00)
10.0 km

5.4 South Sandwich Islands region
2021-08-12 19:50:11 (UTC-04:00)
10.0 km

5.0 South Sandwich Islands region
2021-08-12 19:32:56 (UTC-04:00)
19.9 km

5.4 South Sandwich Islands region
2021-08-12 19:24:27 (UTC-04:00)
51.0 km

5.2 South Sandwich Islands region
2021-08-12 19:23:45 (UTC-04:00)
52.9 km

4.9 South Sandwich Islands region
2021-08-12 19:20:03 (UTC-04:00)
35.0 km

5.0 South Sandwich Islands region
2021-08-12 19:08:13 (UTC-04:00)
35.0 km

4.8 South Sandwich Islands region
2021-08-12 19:07:41 (UTC-04:00)
35.0 km

4.9 South Sandwich Islands region
2021-08-12 18:40:01 (UTC-04:00)
35.0 km

4.9 South Sandwich Islands region
2021-08-12 18:19:11 (UTC-04:00)
35.0 km

5.1 South Sandwich Islands region
2021-08-12 18:13:10 (UTC-04:00)
35.0 km

5.5 South Sandwich Islands region
2021-08-12 18:08:35 (UTC-04:00)
35.0 km

5.1 South Sandwich Islands region
2021-08-12 17:56:55 (UTC-04:00)
10.0 km

5.1 South Sandwich Islands region
2021-08-12 17:48:23 (UTC-04:00)
60.7 km

4.9 South Sandwich Islands region
2021-08-12 17:25:14 (UTC-04:00)
35.0 km

5.2 South Sandwich Islands region
2021-08-12 17:19:55 (UTC-04:00)
35.0 km

5.6 South Sandwich Islands region
2021-08-12 17:07:01 (UTC-04:00)
69.3 km

5.2 South Sandwich Islands region
2021-08-12 16:49:54 (UTC-04:00)
51.9 km

5.4 South Sandwich Islands region
2021-08-12 16:38:07 (UTC-04:00)
69.6 km

5.3 South Sandwich Islands region
2021-08-12 16:36:23 (UTC-04:00)
65.2 km

5.0 South Sandwich Islands region
2021-08-12 16:28:40 (UTC-04:00)
60.1 km

5.4 South Sandwich Islands region
2021-08-12 16:15:17 (UTC-04:00)
35.0 km

5.0 South Sandwich Islands region
2021-08-12 16:14:45 (UTC-04:00)
35.0 km

5.8 South Sandwich Islands region
2021-08-12 16:06:37 (UTC-04:00)
76.4 km

4.9 South Georgia Island region
2021-08-12 16:05:00 (UTC-04:00)
10.0 km

5.5 South Sandwich Islands region
2021-08-12 15:58:58 (UTC-04:00)
10.0 km

6.2 South Sandwich Islands region
2021-08-12 15:44:55 (UTC-04:00)
61.9 km

6.0 South Sandwich Islands region
2021-08-12 15:43:49 (UTC-04:00)
67.7 km

5.1 South Sandwich Islands region
2021-08-12 15:39:22 (UTC-04:00)
10.0 km

4.9 30 km NNE of Tambo, Peru
2021-08-12 15:34:31 (UTC-04:00)
90.3 km

5.7 South Sandwich Islands region
2021-08-12 15:29:14 (UTC-04:00)
48.0 km

5.9 South Sandwich Islands region
2021-08-12 15:07:52 (UTC-04:00)
18.9 km

5.9 South Sandwich Islands region
2021-08-12 14:49:50 (UTC-04:00)
20.0 km

7.5 South Sandwich Islands region
2021-08-12 14:32:54 (UTC-04:00)
63.3 km

KY............. ........

6 replies, 1136 views

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Replies to this discussion thread
Arrow 6 replies Author Time Post
Reply Massive, powerful earthquake storm near South Georgia and South Sandwich Islands (Original post)
KY_EnviroGuy Aug 2021 OP
WheelWalker Aug 2021 #1
bluecollar2 Aug 2021 #2
Iggo Aug 2021 #3
hatrack Aug 2021 #4
Sympthsical Aug 2021 #5
VGNonly Aug 2021 #6

Response to KY_EnviroGuy (Original post)

Fri Aug 13, 2021, 02:58 PM

1. Very interesting.

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Response to KY_EnviroGuy (Original post)

Fri Aug 13, 2021, 03:00 PM

2. Never seen that many clustered like that either...

Good thing that's not a populated area.

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Response to KY_EnviroGuy (Original post)

Fri Aug 13, 2021, 03:02 PM

3. Oh, SWARM.

Iíve lived in Southern California almost 60 years and Iíve never heard of an earthquake storm.

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Response to KY_EnviroGuy (Original post)

Fri Aug 13, 2021, 03:03 PM

4. Fascinating - some of these are literally two minutes or less apart!

Thanks for the heads-up!

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Response to KY_EnviroGuy (Original post)

Fri Aug 13, 2021, 03:07 PM

5. Very very strong for clusters

Don't typically see so many 5.0+ like that.

That whole area is a tectonic mess, though. The Scotia plate is getting it from all sides.

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Response to Sympthsical (Reply #5)

Fri Aug 13, 2021, 06:06 PM

6. A mess indeed.

The Scotia, South American, Sandwich, Shetland and the Antarctic Plates.

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