"2014 Mount Everest avalanche" . "Base Camp avalanche" . . "2015 Mount Everest avalanches" . "April 25, 2015" . "2015 earthquake" . "2015 Mount Everest-South Base Camp disaster" . "2015 avalanche" . . "an avalanche" . "earthquake and subsequent avalanches" . "Earthquake" . . . . "avalanches on and around Mount Everest" . "2015 earthquake avalanche disaster" . . . . "2015 Mount Everest avalanches" . "2015" . . . . . . . "an avalanche on Mount Everest" . "avalanche" . . "avalanches" . "avalanches that struck the southern side of the mountain the following year" .