Paleosismología en la falla de Cofradía, Managua, Nicaraguaresultados preliminares
- Patricia Ruano Roca 1
- Carlos Ariel Rubí Téllez 2
- Eulàlia Masana Closa 1
- O. Piqué-Serra 1
- Pere Santanach i Prat 1
- 1 Dpt. de Geodinàmica i Geofísica, Grup RISKNAT, Fac. de Geologia, Universitat de Barcelona
- 2 CIGEO, Universidad Nacional de Nicaragua, Managua
ISSN: 1576-5172
Datum der Publikation: 2008
Titel der Ausgabe: VII Congreso Geológico de España
Nummer: 10
Seiten: 1059-1062
Art: Artikel
Andere Publikationen in: Geotemas (Madrid)
Zusammenfassung
The N-S trending Cofradía fault is a 40 km-long normal fault, which bounds the Managua graben to the East. This fault is seismically active and has been associated to the 1865 and 1866 earthquakes that modified the topography of the Tipitapa River. A paleoseismological study has been carried out in its southern sector with five trenches in three different sites. The Cocal trench allowed us to identify 3 seismic events. Radiocarbon datings are not available yet, but the presence of ceramic fragments belonging to the Bagaces and Sapoá periods yield by different layers allows us to conclude that these events occurred during the last 1700 years, with a recurrence period in the order of 500 years, being possible that the last event could correspond to the earthquakes of 1865 and 1866.