September 2005 Manda Hararo‐Dabbahu rifting event, Afar (Ethiopia): Constraints provided by geodetic data

  title={September 2005 Manda Hararo‐Dabbahu rifting event, Afar (Ethiopia): Constraints provided by geodetic data},
  author={Rapha{\"e}l Grandin and Anne Socquet and Renaud Binet and Yann Klinger and Eric Jacques and J. B. de Chabalier and Geoffrey C. P. King and C{\'e}cile Lasserre and Stephen Tait and Paul E. Tapponnier and Arthur Delorme and Paul Pinzuti},
  journal={Journal of Geophysical Research},
faults. The volume of the 2005 dike (1.5–2.0 km 3 ) is not balanced by sufficient volume loss at Dabbahu and Gabho volcanoes (0.42 and 0.12 km 3 , respectively). Taking into account the deflation of a suspected deep midsegment magma chamber simultaneously to dike intrusion produces a smoother opening distribution along the southern segment. Above the dike, faults slipped by an average 3 m, yielding an estimated geodetic moment of 3.5 � 10 19 Nm, one order of magnitude larger than the cumulative… 

September 2005 mega‐dike emplacement in the Manda‐Harraro nascent oceanic rift (Afar depression)

Local and regional seismic data constrain the space‐time history of deformation and likely magma sources for the September 2005 diking episode in the Manda‐Harraro rift zone of the Afar depression.

Sequence of rifting in Afar, Manda‐Hararo rift, Ethiopia, 2005–2009: Time‐space evolution and interactions between dikes from interferometric synthetic aperture radar and static stress change modeling

Thirteen dike intrusions in the Manda Hararo rift, Afar (Ethiopia), from September 2005 to June 2009, studied using an extensive interferometric synthetic aperture radar (InSAR) data set, provide

Dike‐fault interaction during the 2004 Dallol intrusion at the northern edge of the Erta Ale Ridge (Afar, Ethiopia)

During continental rifting the interaction between faulting and magmatic intrusions is not well understood. Using InSAR and seismicity, we show that a ∼0.06 km3 dike was intruded along the Dallol

Magmatic rifting and active volcanism: introduction

Abstract A major rifting episode began in the Afar region of northern Ethiopia in September 2005. Over a 10-day period, c. 2.5 km3 of magma were intruded into the upper crust along a 60 km-long dyke

Seismicity during lateral dike propagation: Insights from new data in the recent Manda Hararo–Dabbahu rifting episode (Afar, Ethiopia)

Seismicity released during lateral dike intrusions in the Manda Hararo–Dabbahu Rift (Afar, Ethiopia) provides indirect insight into the distribution and evolution of tensile stress along this

Evidence for Active Rhyolitic dike Intrusion in the Northern Main Ethiopian Rift from the 2015 Fentale Seismic Swarm

Magmatic intrusions play a vital role not only in accommodating extensional stresses in continental rifts but also in feeding volcanic systems. The location, orientation, and timescale of dike

A multidisciplinary study of the final episode of the Manda Hararo dyke sequence, Ethiopia, and implications for trends in volcanism during the rifting cycle

Abstract The sequence of dyke intrusions between 2005 and 2010 in the Manda Hararo rift segment, Ethiopia, provided an opportunity to test conceptual models of continental rifting. Based on trends up

Magmatic Processes in the East African Rift System: Insights From a 2015–2020 Sentinel‐1 InSAR Survey

  • F. AlbinoJ. Biggs
  • Geology, Environmental Science
    Geochemistry, Geophysics, Geosystems
  • 2021
The East African Rift System (EARS) is composed of around 78 Holocene volcanoes, but relatively little is known about their past and present activity. This lack of information makes it difficult to

Structural Mapping of Dike-Induced Faulting in Harrat Lunayyir (Saudi Arabia) by Using High Resolution Drone Imagery

Dike intrusions produce faulting at the surface along with seismic swarms and possible eruptions. Understanding the geometry and kinematics of dike-induced fractures can provide relevant information



Capturing magma intrusion and faulting processes during continental rupture: seismicity of the Dabbahu (Afar) rift

Continental rupture models emphasize the role of faults in extensional strain accommodation; extension by dyke intrusion is commonly overlooked. A major rifting episode that began in 2005 September

Geodetic observations of the ongoing Dabbahu rifting episode: new dyke intrusions in 2006 and 2007

SUMMARY A 60-km-long dyke intruded the Dabbahu segment of the Nubia–Arabia Plate boundary (Afar, Ethiopia) in 2005 September, marking the beginning of an ongoing rifting episode. We have monitored

Magma-maintained rift segmentation at continental rupture in the 2005 Afar dyking episode

A three-dimensional deformation field for the Dabbahu rifting episode derived from satellite radar data shows that the entire segment ruptured, making it the largest to have occurred on land in the era of satellite geodesy.

The volcano–seismic crisis in Afar, Ethiopia, starting September 2005

Recent seismovolcanic crisis in northern Afar, Ethiopia

A 60-kilometer-long rift segment ruptured in north central Afar, Ethiopia, in September 2005. This rupture followed a short but intensive period of volcanic and tectonic activity during which time

Fault growth at a nascent slow-spreading ridge: 2005 Dabbahu rifting episode, Afar

SUMMARY We present a preliminary account of the near-field surface strain associated with a major magmatic rifting episode at a nascent slow spreading ridge in the Afar depression. Between 2005

Relocation of M≥2 events of the 1989 Dôbi seismic sequence in Afar: evidence for earthquake migration

The Ethiopian side of central Afar was struck in August 1989 by the largest seismic sequence (three 6.1 ≤ Ms ≤ 6.3 events, 15 with Ms or mb ≥ 5.0) since that of Serdo in 1969. Using the Djibouti

Secular and tidal strain across the Main Ethiopian Rift

Using a combination of laser ranging and GPS data acquired between 1969 and 1997 we derive a separation velocity for the Somali and Nubian plates in Ethiopia (4.5±1 mm/yr at N108±10E). This vector is

New age constraints on the timing of volcanism in central Afar, in the presence of propagating rifts

[1] We investigate the relationship between rift propagation and volcanism in the Afar Depression in the last 4 Myr. Potassium-argon and thermoluminescence dating allow detailed reconstruction of the