Detailed geodetic imaging of earthquake rupture enhances our understanding of earthquake physics and induced ground shaking. The April 25, 2015 Mw 7.8 Gorkha, Nepal earthquake is the first example of a large continental megathrust rupture beneath a high-rate (5 Hz) GPS network. We use GPS and InSAR data to model the earthquake rupture as a slip pulse of ~20 km width, ~6 s duration, and with peak sliding velocity of 1.1 m/s that propagated toward Kathmandu basin at ~3.3 km/s over ~140 km. The smooth slip onset, indicating a large ~5 m slip-weakening distance, caused moderate ground shaking at high >1Hz frequencies (~16% g) and limited damage to regular dwellings. Whole basin resonance at 4-5 s period caused collapse of tall structures, including cultural artifacts.
Original Source [2]
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/slip-pulse-and-resonance-kathmandu-basin-during-2015-mw-78-gorkha-earthquake-nepal
[2] http://www.sciencemag.org/content/early/2015/08/05/science.aac6383.abstract
[3] http://admin.indiaenvironmentportal.org.in/category/author/j-galetzka
[4] http://admin.indiaenvironmentportal.org.in/category/author/d-melgar
[5] http://admin.indiaenvironmentportal.org.in/category/author/j-f-genrich-et-al
[6] http://admin.indiaenvironmentportal.org.in/category/journal/science-express
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/earthquakes
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nepal
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geology
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/remote-sensing
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters