Aftershocks
Main article: List of aftershocks after the 2015 Nepal earthquake
A major aftershock of magnitude 6.7 Mw occurred on 26 April 2015 in the same region at 12:55 NST (07:09 UTC), with an epicenter located about 17 km (11 mi) south of Kodari, Nepal.[43][44] The aftershock caused fresh avalanches on Mount Everest and was felt in many places in northern India including Kolkata, Siliguri, Jalpaiguri and Assam.[45] The aftershock caused a landslide on the Koshi Highway which blocked the section of the road between Bhedetar and Mulghat.[46]
A model of GeoGateway, based on a United States Geological Survey mechanism of a near-horizontal fault as well as location of aftershocks showed that the fault was an 11° dip striking at 295°, 50 km (31 mi) wide, 150 km (93 mi) long, and had a dip slip of 3 m (9.8 ft).[47] The USGS says the aftershock registered at a shallow depth of 10 km (6.2 mi).[45]
Assuming that 25 April earthquake was the largest event in this seismic episode, Nepal could expect more than 30 aftershocks greater than magnitude 5 over the following month.[48] As of 10 June 2015, 306 aftershocks had occurred with different epicenters and magnitudes equal to or above 4 Mw and more than 20,000 aftershocks less than 4 Mw.[5]