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A review of earthquake occurrences and observations in Nigeria

Earthquake Science 2010年第3期23卷 289-294页

作者： ofonime umo a.pa. Tahir Abubakar Yakubu Centre for Geodesy and Geodynamics

Although Nigeria is not located within the major seismic zones of the world; over the years,several minor earthquakes have been experienced in some parts of the *** first widely reported occurrence of an Earth tremor in Nigeria was in *** events were reported in 1939,1964,1984,1990,1994,1997,2000 and *** intensities of these events ranged from III to VI based on the Modified Mercalli Intensity *** these events,only the 1984,1990,1994 and 2000 events were instrumentally *** had body wave magnitudes ranging from 4.3 to 4.5,local magnitudes between 3.7 and 4.2,and surface wave magnitudes of 3.7 to *** these events occurred,there were no functional seismological observatories in ***,that has now changed with the establishment of a seismographic network managed by the Centre for Geodesy and Geodynamics（CGG）,Toro,***,the network has four operational stations equipped with 24-bit 4-channel recorders and broadband 30-second *** are being made to establish more stations and migrate to real-time collection of seismic data using the general packet radio service（GPRS） technology as well as automatic location of *** sensing,geological and geophysical studies have revealed the presence of a NNE-SSW trending Ifewara-Zungeru fault zone which has been shown to be linked with the Atlantic fracture *** dynamics of the Atlantic fracture zones have been suggested to be responsible for the seismic activities experienced in the areas.

关键词： Nigeria seismic activity seismological observatories Ifewara-Zungeru fault zone

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