focal depth of shallow earthquake

Shallow focus shock

very shallow earthquake

deep focus earthquake

intermediate and deep focus earthquake

intermediate focus earthquake

mechanism of earthquake focus

Earthquake on bottom follow up earthquake on perendicular fault

(2+1) dimensional shallow water wave equation equation

1-D semi-geostrophic shallow water model

1D shallow water equations

1-D shallow water flow

2D shallow water equation

2D shallow water equations

2-D shallow water equations

a shallow mined large-span crossover tunnel

A shrinkage method combining with medium-length hole and shallow hole

activity at the shallow part

age of shallow groundwater