The sequence

Newest first, showing the most recent 50 of 99.

The feed returns at most 100 events per request, so this sequence has at least this many - the real total is higher.

How the rupture zone is measured

An aftershock is a smaller earthquake triggered as the crust settles around the fault that ruptured. They cluster along that rupture, so the area worth searching scales with the size of the mainshock rather than being a fixed radius.

The 91 km zone above comes from the Wells & Coppersmith (1994) rupture-length relation, doubled because aftershocks routinely extend about one rupture length beyond each end of the fault, then floored at 50 km and capped at 400 km. Anything outside it is counted as separate regional seismicity, not part of this sequence.

Aftershocks are most frequent in the hours right after the mainshock and taper off over days to months. A quiet day does not mean the sequence has ended.

Data from USGS, EMSC and partner agencies. Magnitudes and locations are preliminary and may be revised.

Aftershocks after the M 7.0 68 km ENE of Tadine, New Caledonia earthquake

The sequence

How the rupture zone is measured