A tutorial with examples of various access and display types can be seen at crotwell.github.io/seisplotjs. Also see the wiki. Install with npm i --save seisplotjs.
One seismometer is often not enough to reliably detect earthquakes or human activity such as underground nuclear tests.
2022 May 22 Updated plates, boundaries, oc_boundaries and global_gprv following review. Formats are provided as shapefiles (shp), generic mapping tools (GMT), and keyhole markup language (KML) for use ...