Authors :
Anscaire MUKANGE BESA; ZANA NDOTONI
Volume/Issue :
Volume 6 - 2021, Issue 7 - July
Google Scholar :
http://bitly.ws/9nMw
Scribd :
https://bit.ly/3D1v0ax
Abstract :
The design of the unified scale for
characterizing the seismic activity of an area requires its
testing. Thus, we applied this model to the
characterization of the seismicity of the Democratic
Republic of Congo (DRC: 10°E-35°E; 14°S-6°N). For a
better evaluation, this model has been extended to other
areas, including the African Continent (15°W-60°E:
25°S-55°N) -, Indonesia (125°E-150°E ; 10°S-10°N) and
the Pacific coast of Central America (115°W-90°W; 0°N20°N) for the period from 1975 to 2013.
The application of the unified scale to characterize
the seismicity of these areas has provided satisfactory
results. Indeed, the identification of the seismic species in
each Zone-Grid (mesh) and the attribution of the seismic
level (modulus) and the corresponding color code, the
use of the similarity rate parameter as well as the
introduction of the representation of an area as a vector,
allowed:
The development of a device (clock) called Actiseismometer to better follow the seismic activity and
the geodynamics of an area
Modeling of the internal structures of an area using
equations, curves (signatures), zoning maps
(tomography) ...
Demonstration of the clear difference between the
seismicity of the rift zones (25-35°E), marked by high
activity and that outside the rift (10-25°E), of low
activity;
The identification of a transition zone between the
aforementioned zones, located between (20-25°E),
The identification of earthquake zones located in the
sedimentary zone (Congolese craton) where
geophysical research has revealed the presence of
hydrocarbons,
The seismic risk assessment in each Grid Zone of the
DRC which; unlike the classic model, ours indicates a
high seismic risk at:
Zone A23 (Kinshasa-Bandundu and surroundings),
following, in particular, the presence of the Kinshasa
nuclear power plant, and the presence of faults
observed in its surroundings, not to mention the high
density of the population,
Zone A42 (Kivu): the risk is significant there
following the presence of volcanoes (Nyiragongo,
Nyamulagira, etc.) whose flow is heading towards the
city, presence of Lake Kivu containing harmful gas
(methane gas and dioxide of carbon) and the presence
of complex faults observed there, not to mention the
high density of the population,
The comparison of the structures of the Africa, DRC,
Indonesia and Pacific Coast zones of Central America
where we observe that the hypocentres go in
increasing order DRC-Pacific Coast - Indonesia.
Our characterization model will make it possible to map
various parts of the globe and compare them with each
other with the possibility of exploiting it for geological
prospecting: For a better assessment of the seismic risk,
the area of the study area should be reduced
Keywords :
Unified Scale, Characterization, Modulus, Seismic Risk, Internal Structure, Signature, Resemblance Rate, Acti-Seismometer, DRC
The design of the unified scale for
characterizing the seismic activity of an area requires its
testing. Thus, we applied this model to the
characterization of the seismicity of the Democratic
Republic of Congo (DRC: 10°E-35°E; 14°S-6°N). For a
better evaluation, this model has been extended to other
areas, including the African Continent (15°W-60°E:
25°S-55°N) -, Indonesia (125°E-150°E ; 10°S-10°N) and
the Pacific coast of Central America (115°W-90°W; 0°N20°N) for the period from 1975 to 2013.
The application of the unified scale to characterize
the seismicity of these areas has provided satisfactory
results. Indeed, the identification of the seismic species in
each Zone-Grid (mesh) and the attribution of the seismic
level (modulus) and the corresponding color code, the
use of the similarity rate parameter as well as the
introduction of the representation of an area as a vector,
allowed:
The development of a device (clock) called Actiseismometer to better follow the seismic activity and
the geodynamics of an area
Modeling of the internal structures of an area using
equations, curves (signatures), zoning maps
(tomography) ...
Demonstration of the clear difference between the
seismicity of the rift zones (25-35°E), marked by high
activity and that outside the rift (10-25°E), of low
activity;
The identification of a transition zone between the
aforementioned zones, located between (20-25°E),
The identification of earthquake zones located in the
sedimentary zone (Congolese craton) where
geophysical research has revealed the presence of
hydrocarbons,
The seismic risk assessment in each Grid Zone of the
DRC which; unlike the classic model, ours indicates a
high seismic risk at:
Zone A23 (Kinshasa-Bandundu and surroundings),
following, in particular, the presence of the Kinshasa
nuclear power plant, and the presence of faults
observed in its surroundings, not to mention the high
density of the population,
Zone A42 (Kivu): the risk is significant there
following the presence of volcanoes (Nyiragongo,
Nyamulagira, etc.) whose flow is heading towards the
city, presence of Lake Kivu containing harmful gas
(methane gas and dioxide of carbon) and the presence
of complex faults observed there, not to mention the
high density of the population,
The comparison of the structures of the Africa, DRC,
Indonesia and Pacific Coast zones of Central America
where we observe that the hypocentres go in
increasing order DRC-Pacific Coast - Indonesia.
Our characterization model will make it possible to map
various parts of the globe and compare them with each
other with the possibility of exploiting it for geological
prospecting: For a better assessment of the seismic risk,
the area of the study area should be reduced
Keywords :
Unified Scale, Characterization, Modulus, Seismic Risk, Internal Structure, Signature, Resemblance Rate, Acti-Seismometer, DRC
