A seismological and geological investigation for earthquake hazard in the Greater Accra
Metropolitan Area was undertaken. The research was aimed at employing a mathematical
model to estimate the seismic stress for the study area by generating a complete, unified
and harmonized earthquake catalogue spanning 1615 to 2012. Seismic events were
sourced from Leydecker, G. and P. Amponsah, (1986), Ambraseys and Adams, (1986),
Amponsah (2008), Geological Survey Department, Accra, Ghana, Amponsah (2002),
National Earthquake Information Service, United States Geological Survey, Denver,
Colorado 80225, USA, the International Seismological Centre and the National Data
Centre of the Ghana Atomic Energy Commission. Events occurring in the study area
were used to create an Epicentral Intensity Map and a seismicity map of the study area
after interpolation of missing seismic magnitudes.
The least square method and the maximum likelihood estimation method were employed
to evaluate b-values of 0.6 and 0.9 respectively for the study area. A thematic map of
epicentral intensity superimposed on the geology of the study area was also developed to
help understand the relationship between the virtually fractured, jointed and sheared
geology and the seismic events. The results obtained are indicative of the fact that the
stress level of GAMA has a telling effect on its seismicity and also the events are
prevalent at fractured, jointed and sheared zones.
Eastern Network, L (2021). Seismological And Geological Investigation For Earthquake Hazard In The Greater Accra Metropolitan Area. Afribary.com: Retrieved April 17, 2021, from https://afribary.com/works/seismological-and-geological-investigation-for-earthquake-hazard-in-the-greater-accra-metropolitan-area-1
Library, Eastern Network. "Seismological And Geological Investigation For Earthquake Hazard In The Greater Accra Metropolitan Area" Afribary.com. Afribary.com, 07 Apr. 2021, https://afribary.com/works/seismological-and-geological-investigation-for-earthquake-hazard-in-the-greater-accra-metropolitan-area-1 . Accessed 17 Apr. 2021.
Library, Eastern Network. "Seismological And Geological Investigation For Earthquake Hazard In The Greater Accra Metropolitan Area". Afribary.com, Afribary.com, 07 Apr. 2021. Web. 17 Apr. 2021. < https://afribary.com/works/seismological-and-geological-investigation-for-earthquake-hazard-in-the-greater-accra-metropolitan-area-1 >.
Library, Eastern Network. "Seismological And Geological Investigation For Earthquake Hazard In The Greater Accra Metropolitan Area" Afribary.com (2021). Accessed April 17, 2021. https://afribary.com/works/seismological-and-geological-investigation-for-earthquake-hazard-in-the-greater-accra-metropolitan-area-1