Abstract
On 24 October 2002, Mw 6.2 earthquake occurred in the central part of the Lake Kivu basin, Western Branch of the East African Rift. This is the largest event recorded in the Lake Kivu area since 1900. An integrated analysis of radar interferometry (InSAR), seismic and geological data, demonstrates that the earthquake occurred due to normal-slip motion on a major preexisting east-dipping rift border fault. A Coulomb stress analysis suggests that diking events, such as the January 2002 dike intrusion, could promote faulting on the western border faults of the rift in the central part of Lake Kivu. We thus interpret that dike-induced stress changes can cause moderate to large-magnitude earthquakes on major border faults during continental rifting. Continental extension processes appear complex in the Lake Kivu basin, requiring the use of a hybrid model of strain accommodation and partitioning in the East African Rift.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 4280-4291 |
| Number of pages | 12 |
| Journal | Geochemistry, Geophysics, Geosystems |
| Volume | 16 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2015 |
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All Science Journal Classification (ASJC) codes
- Geophysics
- Geochemistry and Petrology
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Diking-induced moderate-magnitude earthquakes on a youthful rift border fault : The 2002 Nyiragongo-Kalehe sequence, D.R. Congo. / Wauthier, C.; Smets, B.; Keir, D.
In: Geochemistry, Geophysics, Geosystems, Vol. 16, No. 12, 12.2015, p. 4280-4291.Research output: Contribution to journal › Article
TY - JOUR
T1 - Diking-induced moderate-magnitude earthquakes on a youthful rift border fault
T2 - The 2002 Nyiragongo-Kalehe sequence, D.R. Congo
AU - Wauthier, C.
AU - Smets, B.
AU - Keir, D.
PY - 2015/12
Y1 - 2015/12
N2 - On 24 October 2002, Mw 6.2 earthquake occurred in the central part of the Lake Kivu basin, Western Branch of the East African Rift. This is the largest event recorded in the Lake Kivu area since 1900. An integrated analysis of radar interferometry (InSAR), seismic and geological data, demonstrates that the earthquake occurred due to normal-slip motion on a major preexisting east-dipping rift border fault. A Coulomb stress analysis suggests that diking events, such as the January 2002 dike intrusion, could promote faulting on the western border faults of the rift in the central part of Lake Kivu. We thus interpret that dike-induced stress changes can cause moderate to large-magnitude earthquakes on major border faults during continental rifting. Continental extension processes appear complex in the Lake Kivu basin, requiring the use of a hybrid model of strain accommodation and partitioning in the East African Rift.
AB - On 24 October 2002, Mw 6.2 earthquake occurred in the central part of the Lake Kivu basin, Western Branch of the East African Rift. This is the largest event recorded in the Lake Kivu area since 1900. An integrated analysis of radar interferometry (InSAR), seismic and geological data, demonstrates that the earthquake occurred due to normal-slip motion on a major preexisting east-dipping rift border fault. A Coulomb stress analysis suggests that diking events, such as the January 2002 dike intrusion, could promote faulting on the western border faults of the rift in the central part of Lake Kivu. We thus interpret that dike-induced stress changes can cause moderate to large-magnitude earthquakes on major border faults during continental rifting. Continental extension processes appear complex in the Lake Kivu basin, requiring the use of a hybrid model of strain accommodation and partitioning in the East African Rift.
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U2 - 10.1002/2015GC006110
DO - 10.1002/2015GC006110
M3 - Article
AN - SCOPUS:84955382747
VL - 16
SP - 4280
EP - 4291
JO - Geochemistry, Geophysics, Geosystems
JF - Geochemistry, Geophysics, Geosystems
SN - 1525-2027
IS - 12
ER -