October 13, 2026

The Ocean Floor Spoke Twice — This Week's Earthquake Watch

By The Discovery Wire

USGS ShakeMap for the Oct 13 M6.7 Mid-Atlantic Ridge earthquake (us6000u1z5)

The ocean floor spoke twice last night — and nobody felt a thing.

Two large earthquakes struck the central Mid-Atlantic Ridge, thousands of kilometers from the nearest coast: a magnitude 6.7 at 1:44 AM Eastern, then a magnitude 6.8 about six and a half hours later. Both were shallow — roughly 10 kilometers deep — and both went completely unfelt. That is the paradox of the mid-ocean ridges: some of the planet's largest quakes happen where almost no one is standing, along the seams where new seafloor is born as tectonic plates pull apart.

Meanwhile, Panama is still settling. Friday's magnitude 7.7 — the third-strongest earthquake of 2026 — has now drawn 1,776 "Did You Feel It?" reports, and its aftershocks keep registering on the instruments:

• M6.1 — 17 km west of Río Grande, Panama, Monday evening (69 felt reports, green alert)
• M6.0 — 7 km north of La Tronosa, Panama, Saturday (64 felt reports, yellow alert)
• M6.6 — 14 km west of Río Grande, Panama, Friday evening (33 felt reports, yellow alert)

That is a textbook aftershock sequence — the fault readjusting itself in steps after the main rupture. Some of those steps carry strong shaking of their own.

Elsewhere this week

• M6.2 — 79 km south-southeast of Panguna, Papua New Guinea, Sunday (53.5 km deep, unfelt, green alert)
• M6.3 — 102 km northeast of Norsup, Vanuatu, Oct 8 (5 felt reports, green alert)

The week's numbers

All told, the USGS-tracked feeds recorded 383 earthquakes of magnitude 2.5 or greater in the last seven days — 181 of them magnitude 4.5 or stronger. Eight reached magnitude 6 or above. The previous week had zero.

That is the Earth being the Earth — ringing like a bell, constantly, mostly where nobody is standing.

We don't forecast here — nobody can. We just read the instruments out loud.

Source: USGS — read the original report