The Bahía Solano Fault (), 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 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 6.5 1970 Bahía Solano earthquake.
Etymology The fault is named after Bahía Solano, Chocó.Paris et al., 2000, p.16
Description The Bahía Solano Fault extends along the Pacific Coast of Colombia, bordering the Panama, Coiba, Malpelo and North Andes Plates.Zhang et al., 2017 It bounds a structural valley between the Solano Bay and Utría Bay, and displaces the Eocene turbidites of the Uva Formation in the south,Galvis Vergara, 1980, p.10 and Cretaceous oceanic Baudó Basalts in the north,Galvis Vergara, 1980, p.23 The fault forms a well developed and continuous fault line (scarp), and the brecciated zone of the fault reaches in width.Galvis Vergara, 1980, p.31 The peninsulas of Cabo Corrientes and Bahía Solano are composed of oceanic crust displaced by the Bahía Solano Fault.Galvis Vergara, 1980, p.34
Segments of the fault have been called Utría Fault,Plancha 183, 2002Plancha 202, 2002Plancha 127, 2002Plancha 163, 2002 and Utría-Bahía Solano Fault.Plancha 143, 2002
Activity The slip rate of the fault is estimated at between per year. The fault is active and produced the 1970 Bahía Solano earthquake with a moment magnitude of 6.5 and a depth of .Ramírez, 1975, p.207 The earthquake was followed by 123 aftershocks in the period from September 26 to October 7, 1970.Ramírez, 1975, p.208
See also
List of earthquakes in Colombia Coiba plate Andinobates altobueyensis
References
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