Octree

A 3D space is searched for sources of seismic energy. Qseek created an octree structure which is iteratively refined when energy is detected, to focus on the source' location. This speeds up the search and improves the resolution of the localisations.

Surface projection of the refined octree focusing on the seismic source region. In this example four levels of refinement are can be seen, refining the 3D octree from the initial 4000 nodes to 8823 nodes.

Octree Module

Config OctreeJSON

location

The reference location of the octree.

root_node_size: 1000.0

Initial size of the root octree node at level 0 in meters.

n_levels: 5

Number of levels in the octree, this defines the final resolution of the detection. Default is 1.

east_bounds

East bounds of the octree in meters.

north_bounds

North bounds of the octree in meters.

depth_bounds

Depth bounds of the octree in meters.

JSON for Octree

{
  "location": {
    "lat": 0.0,
    "lon": 0.0,
    "east_shift": 0.0,
    "north_shift": 0.0,
    "elevation": 0.0,
    "depth": 0.0
  },
  "root_node_size": 1000.0,
  "n_levels": 5,
  "east_bounds": [
    -10000.0,
    10000.0
  ],
  "north_bounds": [
    -10000.0,
    10000.0
  ],
  "depth_bounds": [
    0.0,
    20000.0
  ]
}