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Ethiopia-Afar Geoscientific Lithospheric Experiment

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Series: GSA Special Papers
Published: 01 June 2011
DOI: 10.1130/2011.2478(04)
... and hotspot tectonism. Here, we review the results of a recent multidisciplinary, multi-institutional effort to understand geological processes in the region: the Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE). In 2001–2003, dense broadband seismological networks probed the structure of the upper...
Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.259.01.21
EISBN: 9781862395077
... on rift basin flanking border faults. Ebinger & Casey (2001 ) proposed such a model for the transitional NMER at the southwestern corner of the Afar depression. Testing this model was a main objective of the Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE) ( Maguire et al. 2003...
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Journal Article
Published: 01 August 2013
Bulletin of the Seismological Society of America (2013) 103 (4): 2295-2304.
.... Explosions recorded during the EthiopiaAfar Geoscientific Lithospheric Experiment ( EAGLE ), the International Deep Profiling of Tibet, and the Himalaya ( INDEPTH III ) experiment provided the necessary GT0 reference events. In each case, the local crustal structure is well known and handpicked arrival...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.259.01.23
EISBN: 9781862395077
... off-axis body beneath the NW margin of the rift. These are coincident with Quaternary volcanic chains, anomalies in seismic velocity and conductivity identified by the Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE) along the same profile. We also identify a shallow, high-density body...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.259.01.22
EISBN: 9781862395077
... magnetotelluric (MT) sites were occupied along a profile across the northern Main Ethiopian Rift. The profile covered the central portion of the Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE) line 1 along which also a number of broadband seismic receivers were deployed, a controlled-source seismic...
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Journal Article
Journal: Geology
Published: 01 May 2006
Geology (2006) 34 (5): 329-332.
.... Model resolution can be influenced by anisotropy as well. SKS wave-splitting measurements from the Ethiopia Broadband Seismic Experiment ( Gashawbeza et al., 2004 ) and from the Ethiopia Afar Geoscientific Lithosphere Experiment ( Kendall et al., 2005 ) show splitting times between 0.5 and 1.7 s...
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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP420.18
EISBN: 9781862391345
... Abstract A major rifting episode began in the Afar region of northern Ethiopia in September 2005. Over a 10-day period, c. 2.5 km 3 of magma were intruded into the upper crust along a 60 km-long dyke separating the Arabian and Nubian plates. There was an intense seismic swarm and a small...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.259.01.06
EISBN: 9781862395077
... detail is given to the Ethiopian part of the rift, where we have detailed coverage from data acquired during the EAGLE (Ethiopia Afar Geoscientific Lithospheric Experiment) project ( Maguire et al. 2003 ). After a review of anisotropy mechanisms, we start with the regional picture from teleseismic...
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Journal Article
Published: 26 December 2017
Bulletin of the Seismological Society of America (2018) 108 (1): 145-154.
... ) and the Ethiopia Afar Geoscientific Lithospheric Experiment ( Maguire et al. , 2003 ), Boomer et al. (2013) identified nine GT 5 95 % events in Ethiopia with magnitudes of 3 or greater that occurred between 2001 and 2003. Stations in these networks were located within the Main Ethiopian Rift...
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Image
Station locations (inverted black triangles) for the 2001–2003 <b>Ethiopia</b>–Afa...
Published: 01 August 2013
Figure 1. Station locations (inverted black triangles) for the 2001–2003 EthiopiaAfar Geoscientific Lithospheric experiment ( EAGLE ) network. The wide‐angle profile stations (crosses) were alternately oriented along and across the rift axis. The stars show the locations of the four ground‐truth
Image
Map showing earthquakes and seismic stations used in the tomographic invers...
in > Geology
Published: 01 June 2013
Sea Rift, TJ—triple junction, EAGLE—Ethiopia Afar Geoscientific Lithospheric Experiment, EKBSE—Ethiopia Kenya Broadband Seismic Experiment. Red symbols show data used in tomography for first time, white symbols show stations used in previous studies ( Benoit et al., 2006 ; Bastow et al., 2008 ).
Series: Geological Society, London, Special Publications
Published: 01 January 2011
DOI: 10.1144/SP357.19
EISBN: 9781862396050
... rising and dispersing beneath southern Ethiopia at c. 45 Ma and the other rising beneath the Afar depression (e.g. George et al. 1998 ). More recent geochemical studies have explained their observations based on a modified single-plume hypothesis: multiple upwellings from the African superplume...
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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP420.17
EISBN: 9781862391345
.... 1999 ). The Ethiopia Afar Geoscientific Lithospheric Experiment ( Maguire et al. 2003 ) and the Ethiopia Kenya Broadband Seismic Experiment ( Nyblade & Langston 2002 ) marked the start of a series of deployments of broadband seismometers across the Horn of Africa. Over 200 seismic stations have...
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Journal Article
Published: 01 September 2007
South African Journal of Geology (2007) 110 (2-3): 367-392.
... with the present high topography of Africa, include: plume head impingement of the lithosphere under southern Ethiopia ( Ebinger and Sleep, 1998 ), and/or under the eastern margins of the Tanzanian craton ( Nyblade et al. , 2000b ); dynamic topography due to vertical stresses at the base...
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Journal Article
Published: 01 October 2006
Mineralogical Magazine (2006) 70 (5): 603-604.
.... Stewart, I.D. Bastow and C.J. Ebinger use receiver functions from the Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE) to determine crustal thickness and average V p / V s in the northern MER and its flanking plateaux. The main purpose of EAGLE was to provide ‘a snapshot...
Journal Article
Published: 01 October 2008
Bulletin of the Seismological Society of America (2008) 98 (5): 2341-2348.
... that was part of the EthiopiaAfar Geoscientific Lithosphere Experiment ( Maguire et al. , 2003 ). Local magnitude is an important parameter in earthquake hazard assessments both in terms of quantifying the rate and amount of seismicity and in understanding the attenuation of ground motion with distance...
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Journal Article
Journal: Geosphere
Published: 01 June 2016
Geosphere (2016) 12 (3): 706-720.
... and magmatism from the boundary faults to the rift axis, with extension occurring obliquely to the overall NE-SW trend of the Main Ethiopian Rift (Wonji fault belt; Mohr, 1967 ; Ebinger and Casey, 2001 ; Corti, 2008 , 2009 ). The extensive magma intrusions imaged by EAGLE (Ethiopia-Afar Geoscientific...
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Journal Article
Journal: Geology
Published: 01 June 2013
Geology (2013) 41 (6): 635-638.
... Sea Rift, TJ—triple junction, EAGLE—Ethiopia Afar Geoscientific Lithospheric Experiment, EKBSE—Ethiopia Kenya Broadband Seismic Experiment. Red symbols show data used in tomography for first time, white symbols show stations used in previous studies ( Benoit et al., 2006 ; Bastow et al., 2008 ). ...
FIGURES
Journal Article
Journal: Geology
Published: 01 November 2004
Geology (2004) 32 (11): 949-952.
.... The Main Ethiopian rift, situated south of seafloor spreading in the Red Sea ( Fig. 1 , inset), is an excellent location to study how continental rifts develop into oceanic ridges. A 2003 controlled-source seismic experiment in the Main Ethiopian rift (part of the EAGLE project [Ethiopia-Afar...
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Journal Article
Published: 01 March 2003
Seismological Research Letters (2003) 74 (2): 98-102.
... across the Horn of Africa to conduct what is being termed Africa's largest-ever seismic survey. The group is launching a study to deterimne if a growing split in the Rift Valley could eventually cause a new sea to form. Operation EAGLE (Ethiopia Afar Geoscientific Lithospheric Experiment) will plant...