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- W2556222786 abstract "The 2015 Gorkha earthquake (Mw 7.8) occurred by thrust faulting on a ∼150 km long and ∼70 km wide, locked downdip segment of the Main Himalayan Thrust (MHT), causing the Himalaya to slip SSW over the Indian Plate, and was followed by major-to-moderate aftershocks. Back projection of teleseismic P-wave and inversion of teleseismic body waves provide constraints on the geometry and kinematics of the main-shock rupture and source mechanism of aftershocks. The main-shock initiated ∼80 km west of Katmandu, close to the locking line on the MHT and propagated eastwards along ∼117|$rm ^{circ }$| azimuth for a duration of ∼70 s, with varying rupture velocity on a heterogeneous fault surface. The main-shock has been modelled using four subevents, propagating from west-to-east. The first subevent (0–20 s) ruptured at a velocity of ∼3.5 km s− 1 on a ∼6|$rm ^{circ }$|N dipping flat segment of the MHT with thrust motion. The second subevent (20–35 s) ruptured a ∼18|$rm ^{circ }$| W dipping lateral ramp on the MHT in oblique thrust motion. The rupture velocity dropped from 3.5 km s− 1 to 2.5 km s− 1, as a result of updip propagation of the rupture. The third subevent (35–50 s) ruptured a ∼7|$rm ^{circ }$|N dipping, eastward flat segment of the MHT with thrust motion and resulted in the largest amplitude arrivals at teleseismic distances. The fourth subevent (50–70 s) occurred by left-lateral strike-slip motion on a steeply dipping transverse fault, at high angle to the MHT and arrested the eastward propagation of the main-shock rupture. Eastward stress build-up following the main-shock resulted in the largest aftershock (Mw 7.3), which occurred on the MHT, immediately east of the main-shock rupture. Source mechanisms of moderate aftershocks reveal stress adjustment at the edges of the main-shock fault, flexural faulting on top of the downgoing Indian Plate and extensional faulting in the hanging wall of the MHT." @default.
- W2556222786 created "2016-11-30" @default.
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- W2556222786 date "2016-11-22" @default.
- W2556222786 modified "2023-09-26" @default.
- W2556222786 title "The 2015 April 25 Gorkha (Nepal) earthquake and its aftershocks: implications for lateral heterogeneity on the Main Himalayan Thrust" @default.
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- W2556222786 doi "https://doi.org/10.1093/gji/ggw438" @default.
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