Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria
Abstract Preliminary field assessment of the geological evidence for the September 2016 multiple tremors was felt as far as 10 km in Nok and Chori villages in the north and northwest of Kwoi respectively. This involved systematic studies of the crack pattern and intensity on buildings, rocks and han...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:53ac7c809d6b40ba9ba005d8051d5c9a 2023-05-15T17:36:54+02:00 Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria Nathaniel Goter Goki Solomon Anayo Onwuka Adama Baba Oleka Shekwoyandu Iyakwari Ishak Yau Tanko Aisha Abubakar Kana Allu Augustine Umbugadu Halima Osu Usman 2020-07-01 https://doi.org/10.1186/s40677-020-00156-w https://doaj.org/article/53ac7c809d6b40ba9ba005d8051d5c9a en eng SpringerOpen doi:10.1186/s40677-020-00156-w 2197-8670 https://doaj.org/article/53ac7c809d6b40ba9ba005d8051d5c9a undefined Geoenvironmental Disasters, Vol 7, Iss 1, Pp 1-10 (2020) Geological evidence Tremor Tectonic origin Kwoi Nigeria geo demo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.1186/s40677-020-00156-w 2023-01-22T17:49:39Z Abstract Preliminary field assessment of the geological evidence for the September 2016 multiple tremors was felt as far as 10 km in Nok and Chori villages in the north and northwest of Kwoi respectively. This involved systematic studies of the crack pattern and intensity on buildings, rocks and hanging walls of slopes around the area with the highest shock. The structural mapping was complemented by composite images of SPOT 5, supplementary subsurface investigations utilized aeromagnetic data, seismic data, and Digital Terrain Model (DTM) for the area. Results show that the major evidence that proved a possible link to the area of highest impact is the tremor triggered displacement of a 4 by 3 m diameter rock boulder situated about a kilometre from the Kwoi town, some 3 km from the nearest epicentre that fell through a cumulative distance of 25 m, splitting the fresh granite boulder into two and creating a high impact scar on its path. Seismic vibrations that shook the residents of Kwoi and environs (with epicentres located along a NE-SW linear traverse and remotely coinciding with buried fractures) appear to have been generated and propagated laterally from the rocks along a northwest-southeast profile. Despite the non-homogenous strengths of the impacted buildings, the near-consistency of the E-W striking walls being the most fractured gives a remote connection with the major 345° to 015° fracture patterns on the granitic plutons that shields Kwoi town to the north. Additionally, the intensity of the fractures and collapse in the buildings increased south-westwards from the perceived area of highest impact. A possible tectonic origin related to stress build up in the rocks of the area for the tremors can be insinuated thereby foreclosing the theory of a non-tectonic origin being considered in some quarters including the recent Mpape Abuja tremor of 2018. All these epicentres plot along an extrapolated trend that coincides with the Chain Fracture Zone of the North Atlantic. Article in Journal/Newspaper North Atlantic Unknown Geoenvironmental Disasters 7 1 |
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Open Polar |
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op_collection_id |
fttriple |
language |
English |
topic |
Geological evidence Tremor Tectonic origin Kwoi Nigeria geo demo |
spellingShingle |
Geological evidence Tremor Tectonic origin Kwoi Nigeria geo demo Nathaniel Goter Goki Solomon Anayo Onwuka Adama Baba Oleka Shekwoyandu Iyakwari Ishak Yau Tanko Aisha Abubakar Kana Allu Augustine Umbugadu Halima Osu Usman Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
topic_facet |
Geological evidence Tremor Tectonic origin Kwoi Nigeria geo demo |
description |
Abstract Preliminary field assessment of the geological evidence for the September 2016 multiple tremors was felt as far as 10 km in Nok and Chori villages in the north and northwest of Kwoi respectively. This involved systematic studies of the crack pattern and intensity on buildings, rocks and hanging walls of slopes around the area with the highest shock. The structural mapping was complemented by composite images of SPOT 5, supplementary subsurface investigations utilized aeromagnetic data, seismic data, and Digital Terrain Model (DTM) for the area. Results show that the major evidence that proved a possible link to the area of highest impact is the tremor triggered displacement of a 4 by 3 m diameter rock boulder situated about a kilometre from the Kwoi town, some 3 km from the nearest epicentre that fell through a cumulative distance of 25 m, splitting the fresh granite boulder into two and creating a high impact scar on its path. Seismic vibrations that shook the residents of Kwoi and environs (with epicentres located along a NE-SW linear traverse and remotely coinciding with buried fractures) appear to have been generated and propagated laterally from the rocks along a northwest-southeast profile. Despite the non-homogenous strengths of the impacted buildings, the near-consistency of the E-W striking walls being the most fractured gives a remote connection with the major 345° to 015° fracture patterns on the granitic plutons that shields Kwoi town to the north. Additionally, the intensity of the fractures and collapse in the buildings increased south-westwards from the perceived area of highest impact. A possible tectonic origin related to stress build up in the rocks of the area for the tremors can be insinuated thereby foreclosing the theory of a non-tectonic origin being considered in some quarters including the recent Mpape Abuja tremor of 2018. All these epicentres plot along an extrapolated trend that coincides with the Chain Fracture Zone of the North Atlantic. |
format |
Article in Journal/Newspaper |
author |
Nathaniel Goter Goki Solomon Anayo Onwuka Adama Baba Oleka Shekwoyandu Iyakwari Ishak Yau Tanko Aisha Abubakar Kana Allu Augustine Umbugadu Halima Osu Usman |
author_facet |
Nathaniel Goter Goki Solomon Anayo Onwuka Adama Baba Oleka Shekwoyandu Iyakwari Ishak Yau Tanko Aisha Abubakar Kana Allu Augustine Umbugadu Halima Osu Usman |
author_sort |
Nathaniel Goter Goki |
title |
Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
title_short |
Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
title_full |
Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
title_fullStr |
Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
title_full_unstemmed |
Preliminary geological evidence for multiple tremors in Kwoi, Central Nigeria |
title_sort |
preliminary geological evidence for multiple tremors in kwoi, central nigeria |
publisher |
SpringerOpen |
publishDate |
2020 |
url |
https://doi.org/10.1186/s40677-020-00156-w https://doaj.org/article/53ac7c809d6b40ba9ba005d8051d5c9a |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geoenvironmental Disasters, Vol 7, Iss 1, Pp 1-10 (2020) |
op_relation |
doi:10.1186/s40677-020-00156-w 2197-8670 https://doaj.org/article/53ac7c809d6b40ba9ba005d8051d5c9a |
op_rights |
undefined |
op_doi |
https://doi.org/10.1186/s40677-020-00156-w |
container_title |
Geoenvironmental Disasters |
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7 |
container_issue |
1 |
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1766136544824918016 |