South Sandwich Islands - 6.2 Magnitude and 4.6 Magnitude Earthquake July 26th, 2013

Earth Watch Report  -  Earthquakes

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M6.2 - 203km NE of Bristol Island, South Sandwich Islands

 2013-07-26 21:32:59 UTC

 

Event Time

1. 2013-07-26 21:32:59 UTC
2. 2013-07-26 19:32:59 UTC-02:00 at epicenter
3. 2013-07-26 16:32:59 UTC-05:00 system time

Location

57.789°S 23.959°W depth=10.0km (6.2mi)

Nearby Cities

1. 203km (126mi) NE of Bristol Island, South Sandwich Islands
2. 2715km (1687mi) ESE of Ushuaia, Argentina
3. 2937km (1825mi) ESE of Rio Gallegos, Argentina
4. 2952km (1834mi) ESE of Punta Arenas, Chile
5. 2258km (1403mi) ESE of Stanley, Falkland Islands

Related Links

• View location in Google Maps

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Contributed by USGS National Earthquake Information Center

Instrumental Intensity

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M4.6 - 152km S of Bristol Island, South Sandwich Islands

 2013-07-26 02:38:05 UTC

Event Time

1. 2013-07-26 02:38:05 UTC
2. 2013-07-26 00:38:05 UTC-02:00 at epicenter
3. 2013-07-25 21:38:05 UTC-05:00 system time

Location

60.398°S 26.807°W depth=41.4km (25.7mi)

Nearby Cities

1. 152km (94mi) S of Bristol Island, South Sandwich Islands
2. 2512km (1561mi) ESE of Ushuaia, Argentina
3. 2756km (1712mi) SE of Punta Arenas, Chile
4. 2762km (1716mi) SE of Rio Gallegos, Argentina
5. 2135km (1327mi) SE of Stanley, Falkland Islands

Related Links

• View location in Google Maps

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Related articles

• South Sandwich Islands - 7.3 Magnitude Earthquake - 216km SSE of Bristol Island
• 6.2M - Earthquake Strikes Bristol Island, South Sandwich Islands
• Moderate earthquake - South Sandwich Islands Region on July 26, 2013
• M7.3 - 216km SSE of Bristol Island, South Sandwich Islands

South Sandwich Islands - 7.3 Magnitude Earthquake - 216km SSE of Bristol Island

Earth Watch Report  -  Earthquakes

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M7.3 - 216km SSE of Bristol Island, South Sandwich Islands

 2013-07-15 14:03:42 UTC

 

Event Time

1. 2013-07-15 14:03:42 UTC
2. 2013-07-15 12:03:42 UTC-02:00 at epicenter
3. 2013-07-15 09:03:42 UTC-05:00 system time

Location

60.860°S 25.189°W depth=31.3km (19.5mi)

Nearby Cities

1. 216km (134mi) SSE of Bristol Island, South Sandwich Islands
2. 2596km (1613mi) ESE of Ushuaia, Argentina
3. 2841km (1765mi) SE of Punta Arenas, Chile
4. 2851km (1772mi) SE of Rio Gallegos, Argentina
5. 2233km (1388mi) SE of Stanley, Falkland Islands

Related Links

• View location in Google Maps

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Tectonic Summary

The July 15, 2013 Mw7.3 South Sandwich Islands earthquake occurred as a result of either east-west left-lateral or north-south right-lateral strike slip motion at shallow oceanic crustal depths. The earthquake occurred ~100km east of a complex plate triple junction between the South America, Antarctica, and Sandwich plates. The South America plate currently subducts beneath the Sandwich plate at a rate of ~13mm/yr while sliding past the Antarctica plate with left-lateral motion along the South Sandwich Fracture Zone at a rate of ~14mm/yr. Given the strike slip nature and location of the event, the earthquake likely resulted from relative motion between the South America and Antarctica plates. Several large earthquakes have occurred along this portion of the plate boundary, including events of Mw7.4 in January 2006 and Mw7.5 in October 1973.

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Contributed by USGS National Earthquake Information Center

Instrumental Intensity

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Related articles

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• M7.3 - 216km SSE of Bristol Island, South Sandwich Islands
• 7.3 magnitude earthquake shakes seafloor near South Sandwich Islands
• New post Earth Alerts|South Sandwich Islands region - Earthquake, magnitude 7.3 (Major)
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• Strong earthquake - South Sandwich Islands Region on June 16, 2013