Bahía Solano Fault

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Coordinates: 05°53′13″N 77°21′47″W / 5.88694°N 77.36306°W / 5.88694; -77.36306
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Bahía Solano Fault
Falla Bahía Solano, Utría Fault, Utría-Bahía Solano Fault
Age
Quaternary
OrogenyAndean

The Bahía Solano Fault (

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

The fault is named after Bahía Solano, Chocó.[1]

Description

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

The slip rate of the fault is estimated at between 0.2 and 1 millimetre (0.0079 and 0.0394 in) per year.

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

References

  1. ^ a b c Paris et al., 2000, p.16
  2. ^ Zhang et al., 2017
  3. ^ Galvis Vergara, 1980, p.10
  4. ^ a b Plancha 183, 2002
  5. ^ a b Plancha 202, 2002
  6. ^ Galvis Vergara, 1980, p.23
  7. ^ a b Plancha 127, 2002
  8. ^ a b Plancha 143, 2002
  9. ^ a b Plancha 163, 2002
  10. ^ Galvis Vergara, 1980, p.31
  11. ^ a b Galvis Vergara, 1980, p.34
  12. ^ Ramírez, 1975, p.207
  13. ^ USGS. "M 6.5 - near the west coast of Colombia". United States Geological Survey. Retrieved 2017-09-18.
  14. ^ Ramírez, 1975, p.208

Bibliography

Maps

Further reading

  • Page, W.D. 1986. Seismic geology and seismicity of Northwestern Colombia, 1–200. San Francisco, California, Woodward-Clyde Consultants Report for ISA and Integral Ltda., Medellín.
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