Compare Seismic Activity Between Regions

Put two regions side by side to understand how plate boundaries shape very different earthquake patterns.

1. 1

   Pick two contrasting regions

   Choose regions on different boundary types, like California (strike-slip) and Chile (subduction). Open each region page in a tab and set both to the past 30 days at M4.5+ for a fair comparison.

2. 2

   Compare depth and magnitude

   Notice that subduction zones like Chile and Indonesia produce deeper, larger events, while transform regions like California show shallower, more frequent moderate quakes. Depth next to each quake makes the difference visible.

3. 3

   Note the induced-seismicity outlier

   Compare a tectonic region to Oklahoma, where many quakes trace back to wastewater injection rather than plate motion. It is a clear example of how cause, not just location, defines a region's seismic fingerprint.