Active Fault Mapping in Karonga-Malawi after the December 19, 2009 Ms 6.2 Seismic Event

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dc.contributor.authorMacheyeki, Athanas S.
dc.contributor.authorMdala, Hassan
dc.contributor.authorChapola, Lostina S.
dc.contributor.authorManhiça, V. J.
dc.contributor.authorChisambi, Joshua
dc.contributor.authorFeitio, Paulino
dc.contributor.authorAyele, Atalay
dc.contributor.authorBarongo, J.
dc.contributor.authorFerdinand, Richard W.
dc.contributor.authorOgubazghi, G.
dc.contributor.authorGoitom, B.
dc.contributor.authorHlatywayo, Dumisani J.
dc.contributor.authorKianji, Gladys
dc.contributor.authorMarobhe, I.
dc.contributor.authorMulowezi, A.
dc.contributor.authorMutamina, Daniel
dc.contributor.authorMwano, J. M.
dc.contributor.authorShumba, Blessing
dc.contributor.authorTumwikirize, I.
dc.date.accessioned2016-06-13T06:06:21Z
dc.date.available2016-06-13T06:06:21Z
dc.date.issued2015
dc.description.abstractThe East African Rift System (EARS) has natural hazards – earthquakes, volcanic eruptions, and landslides along the faulted margins, and in response to ground shaking. Strong damaging earthquakes have been occurring in the region along the EARS throughout historical time, example being the 7.4 (Ms) of December 1910. The most recent damaging earthquake is the Karonga earthquake in Malawi, which occurred on 19th December, 2009 with a magnitude of 6.2 (Ms). The earthquake claimed four lives and destroyed over 5000 houses. In its effort to improve seismic hazard assessment in the region, Eastern and Southern Africa Seismological Working Group (ESARSWG) under the sponsorship of the International Program on Physical Sciences (IPPS) carried out a study on active fault mapping in the region. The fieldwork employed geological and geophysical techniques. The geophysical techniques employed are ground magnetic, seismic refraction and resistivity surveys but are reported elsewhere. This article gives findings from geological techniques. The geological techniques aimed primarily at mapping of active faults in the area in order to delineate presence or absence of fault segments. Results show that the Karonga fault (the Karonga fault here referred to as the fault that ruptured to the surface following the 6th–19th December 2009 earthquake events in the Karonga area) is about 9 km long and dominated by dip slip faulting with dextral and insignificant sinistral components and it is made up of 3–4 segments of length 2–3 km. The segments are characterized by both left and right steps. Although field mapping show only 9 km of surface rupture, maximum vertical offset of about 43 cm imply that the surface rupture was in little excess of 14 km that corresponds with Mw = 6.4. We recommend the use or integration of multidisciplinary techniques in order to better understand the fault history, mechanism and other behavior of the fault/s for better urban planning in the area.en_US
dc.identifier.citationMacheyeki, A.S., Mdala, H., Chapola, L.S., Manhiça, V.J., Chisambi, J., Feitio, P., Ayele, A., Barongo, J., Ferdinand, R.W., Ogubazghi, G. and Goitom, B., 2015. Active fault mapping in Karonga-Malawi after the December 19, 2009 Ms 6.2 seismic event. Journal of African Earth Sciences, 102, pp.233-246.en_US
dc.identifier.doi10.1016/j.jafrearsci.2014.10.010
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2434
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectDecember 2009 seismic eventen_US
dc.subjectActive fault mappingen_US
dc.subjectFault segmenten_US
dc.subjectKarongaen_US
dc.subjectMalawien_US
dc.titleActive Fault Mapping in Karonga-Malawi after the December 19, 2009 Ms 6.2 Seismic Eventen_US
dc.typeJournal Article, Peer Revieweden_US
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