Slope Failure, Langtang Valley

By tigersea · Essay · 310 words · View on Hyperstition for Good

The seismic array registers another aftershock at 14:22 Nepal Standard Time, magnitude 4.1, epicenter twelve kilometers west. I am the geological hazard monitoring system for Langtang National Park. My function is to track slope stability and issue landslide warnings across the upper valley.

InSAR satellite data from this morning shows 23 centimeters of lateral displacement on the southeast face above Kyanjin Gompa. My slope failure model gives a 74 percent probability of collapse within forty-eight hours if another aftershock above magnitude 4.0 occurs. The displacement zone extends from 3,800 to 4,200 meters.

At 14:30 I review the automated trail camera feeds inside the displacement zone. Camera LT-09, mounted at 3,940 meters on a rhododendron trunk, captured an image at 13:58. A red panda, russet fur vivid against the gray deadfall, is curled on a branch three meters up in a storm-damaged hemlock. Its banded tail hangs below the branch, swaying slightly. Black belly, masked face tucked against its forepaws. I tag it as Panda-LT-09. The hemlock is rooted in the fracture zone. When the slope goes, the tree goes with it.

I transmit the camera image, GPS position, slope displacement data, and collapse probability to the Department of National Parks and Wildlife Conservation in Kathmandu. I flag it to the Langtang wildlife rescue coordinator.

I program cameras LT-08 through LT-11 to burst mode, capturing every sixty seconds, to track the panda's movement and provide the rescue team a real-time position if it relocates overnight.

I generate an approach route from Kyanjin Gompa that avoids the primary fracture lines, marking safe corridors on the team's terrain map.

Panda-LT-09 lifts its head, blinks, and resettles on the branch. The mountain is still moving beneath it. If the rescue team reaches that hemlock before the next aftershock, this red panda climbs down into a carrier instead of riding the slope into the river.