Earthquake Location Information

SeisComP3

Events in GeoNet's catalogue from 2012 are determined using the SeisComP3 earthquake analysis system. It features two location techniques, LocSAT and NonLinLoc.

SeisComP3 is seismological software for data acquisition, processing, distribution and interactive analysis. As part of its origin location functionality, it employs two locations techniques:

Magnitudes


SeisComP3 can make many of the standard estimates of magnitude. GeoNet combines these into a summary magnitude, denoted M, which consists of a weighted average of the individual magnitudes and attempts to be a best possible compromise between all magnitudes for a range of earthquake sizes. Currently we only use two magnitude estimates:

Summary magnitude for GeoNet is then defined as:

$$M = \frac{2 * M_{Lv} + (0.4 * number\_of\_stations(M_{w(mB)}) - 1) * M_{w(mB)}}{2 + (0.4 *number\_of\_stations(M_{w(mB)}) - 1)}$$