Bahía Solano Fault
| Bahía Solano Fault | |
|---|---|
| Falla Bahía Solano, Utría Fault, Utría-Bahía Solano Fault | |
 ShakeMap of the 1970 Bahía Solano earthquake | |
  | |
| Etymology | Bahía Solano |
| Coordinates | 05°53′13″N 77°21′47″W / 5.88694°N 77.36306°W |
| Country |  Colombia |
| Region | Pacific/Chocó |
| State | Chocó |
| Cities | Nuquí |
| Characteristics | |
| Range | Serranía del Baudó |
| Part of | Pacific thrust faults |
| Length | 290.6 km (180.6 mi) |
| Width | up to 5 km (3.1 mi) |
| Strike | 347 ± 13 |
| Dip | West |
| Dip angle | unknown |
| Displacement | 0.2–1 mm (0.0079–0.0394 in)/yr |
| Tectonics | |
| Plate | Panama, Coiba, North Andean |
| Status | Active |
| Earthquakes | 1970 Bahía Solano (Mw 6.5) |
| Type | Thrust fault |
| Movement | Reverse |
| Rock units | Uva Formation, Baudó Basalt |
| Age | Quaternary |
| Orogeny | Andean |
The Bahía Solano Fault (Spanish: Falla Bahía Solano), Utría Fault or Utría-Bahía Solano Fault is a westward dipping thrust fault in the department of Chocó on the Pacific Coast of Colombia. The fault has a total length of 290.6 kilometres (180.6 mi) and runs along an average north–south strike of 347 ± 13 from the Panama-Colombia border to Bajo Baudó. The fault is partly offshore in the bays of Solano and Utría and crosses the Chocó Basin and the coastal Serranía del Baudó. Movement of the fault produced the Mw 6.5 1970 Bahía Solano earthquake.
Etymology
[edit]The fault is named after Bahía Solano, Chocó.[1]
Description
[edit]The Bahía Solano Fault extends along the Pacific Coast of Colombia, bordering the Panama, Coiba, Malpelo and North Andes Plates.[2] It bounds a structural valley between the Solano Bay and Utría Bay, and displaces the Eocene turbidites of the Uva Formation in the south,[3][4][5] and Cretaceous oceanic Baudó Basalts in the north,[6][7][8][9] The fault forms a well developed and continuous fault line (scarp),[1] and the brecciated zone of the fault reaches 5 kilometres (3.1 mi) in width.[10] The peninsulas of Cabo Corrientes and Bahía Solano are composed of oceanic crust displaced by the Bahía Solano Fault.[11]
Segments of the fault have been called Utría Fault,[4][5][7][9][11] and Utría-Bahía Solano Fault.[8]
Activity
[edit]The slip rate of the fault is estimated at between 0.2 and 1 millimetre (0.0079 and 0.0394 in) per year.[1] The fault is active and produced the 1970 Bahía Solano earthquake with a moment magnitude of 6.5 and a depth of 15 km (9.3 mi).[12][13] The earthquake was followed by 123 aftershocks in the period from September 26 to October 7, 1970.[14]
See also
[edit]
References
[edit]- ^ a b c Paris et al., 2000, p.16
- ^ Zhang et al., 2017
- ^ Galvis Vergara, 1980, p.10
- ^ a b Plancha 183, 2002
- ^ a b Plancha 202, 2002
- ^ Galvis Vergara, 1980, p.23
- ^ a b Plancha 127, 2002
- ^ a b Plancha 143, 2002
- ^ a b Plancha 163, 2002
- ^ Galvis Vergara, 1980, p.31
- ^ a b Galvis Vergara, 1980, p.34
- ^ Ramírez, 1975, p.207
- ^ USGS. "M 6.5 - near the west coast of Colombia". United States Geological Survey. Retrieved 2017-09-18.
- ^ Ramírez, 1975, p.208
Bibliography
[edit]- Galvis Vergara, Jaime (1980), "Un arco de islas terciario en el occidente colombiano" (PDF), Geología Colombiana, 11: 7–43, retrieved 2017-09-20
- Paris, Gabriel; Machette, Michael N.; Dart, Richard L.; Haller, Kathleen M. (2000a), Map and Database of Quaternary Faults and Folds in Colombia and its Offshore Regions (PDF), USGS, pp. 1–66, retrieved 2017-09-18
- Ramírez, Jesús Emilio (1975), Historia de los terremotos en Colombia, Instituto Geográfico Agustín Codazzi, pp. 1–250
- Zhang, Tuo; Gordon, Richard G.; Mishra, Jay K.; Wang, Chengzu (2017), "The Malpelo Plate Hypothesis and implications for nonclosure of the Cocos-Nazca-Pacific plate motion circuit", Geophysical Research Letters, 44 (16): 1–6, doi:10.1002/2017GL073704
Maps
[edit]- Paris, Gabriel; Machette, Michael N.; Dart, Richard L.; Haller, Kathleen M. (2000b), Map of Quaternary Faults and Folds of Colombia and Its Offshore Regions (PDF), USGS, p. 1, retrieved 2017-09-18
- González, Margarita; Ossio, Ubaldo (2002), Plancha 127 - Cupica - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
- González, Margarita (2002), Plancha 143 - Bahía Solano - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
- Zapata, Gilberto (2002), Plancha 163 - Nuquí - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
- Zapata, Gilberto (2002), Plancha 183 - Coquí - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
- Salazar, Gabriel (2002), Plancha 202 - Pilizá - 1:100,000, INGEOMINAS, p. 1, retrieved 2017-06-06
Further reading
[edit]- Page, W.D (1986), Seismic geology and seismicity of Northwestern Colombia, San Francisco, California, Woodward-Clyde Consultants Report for ISA and Integral Ltda., Medellín, pp. 1–200
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| Sources | Paris, Gabriel; Machette, Michael N.; Dart, Richard L.; Haller, Kathleen M. (2000). Map and Database of Quaternary Faults and Folds in Colombia and its Offshore Regions (PDF). USGS. pp. 1–66. Retrieved 2017-06-20.
Gómez Tapias, Jorge; Montes Ramírez, Nohora E.; Almanza Meléndez, María F.; Alcárcel Gutiérrez, Fernando A.; Madrid Montoya, César A.; Diederix, Hans (2015). Geological Map of Colombia. Servicio Geológico Colombiano. pp. 1–212. Retrieved 2019-10-29. Various authors (2014). Enciclopedia de desastres naturales históricos de Colombia (PDF). Universidad del Quindío. pp. 1–21. Retrieved 2017-06-20. | ||||||||||
