1949 Tierra del Fuego earthquakes
The 1949 Tierra del Fuego earthquakes occurred slightly more than eight hours apart on 17 December. Their epicenters were located in the east of the Chilean Tierra del Fuego Province, close to the Argentine border on the island of Tierra del Fuego.
  | |
| UTC time | Doublet earthquake: |
|---|---|
| A: 1949-12-17 06:53:32 | |
| B: 1949-12-17 15:07:57 | |
| ISC event | |
| A: 897093 | |
| B: 897095 | |
| USGS-ANSS | |
| A: ComCat | |
| B: ComCat | |
| Local date | December 17, 1949 |
| Local time | |
| A: 03:53 (UTC−03:00) | |
| B: 12:07 (UTC−03:00) | |
| Magnitude | Doublet earthquake: |
| A: 7.7 Mw(ISC-GEM) | |
| B: 7.6 Mw(OSC-GEM) | |
| Epicenter | 53.97°S 69.56°W |
| Max. intensity | VIII (Severe) [1] |
The two shocks measured 7.7 and 7.6 on the moment magnitude scale and were the most powerful ever recorded in the south of Argentina and one of the most powerful in austral Chile. They were felt with intensities as high as VIII (Severe) on the Mercalli intensity scale, and affected the settlements of Punta Arenas and Río Gallegos.
References
- Costa, C.H.; Smalley Jr., R.; Schwartz, D.P.; Stenner, H.D.; Ellis, M.; Ahumada, E.A.; Velasco, M.S. (2006), "Paleoseismic observations of an onshore transform boundary: the Magallanes-Fagnano fault, Tierra del Fuego Argentina", Revista de la Asociación Geológica Argentina, 61 (4)
External links
- (in Spanish) Instituto Nacional de Prevención Sísmica. Listado de Terremotos Históricos.
- The International Seismological Centre has a bibliography and/or authoritative data for this event.
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