Not sure if suitable for your purposes, but GeoNet. They use a network of digital seismic stations. Whenever seismic waves propagate, doing a time-analysis of w

Not sure if suitable for your purposes, but GeoNet. They use a network of digital seismic stations. Whenever seismic waves propagate, doing a time-analysis of when they passed under each station can tell you where the quake occurred. This is augmented with crowd-sourced "felt reports". Literally within seconds of a shake, the preliminary report hits their website, and its confidence level increases over the next few minutes as more data reports in. I believe their online (open) data set now catalogs all NZ-region earthquake events from like the last 80 years or something. Pretty neat. Here is the page for the big one of 6 hours ago, not to be confused with the dozens of also-large aftershocks following it: https://www.geonet.org.nz/quakes/region/newzealand/2016p858000 https://www.geonet.org.nz/quakes/region/newzealand/2016p8580...