A magnitude 5.2 earthquake hit 4 km south of Bajo Corral, Panama, and 28 people reported feeling it

A magnitude 5.2 earthquake struck 4 km south of Bajo Corral, Panama, at 15:50 UTC on October 31, 2026, and by the evening update the U.S. Geological Survey had logged 28 felt reports from people who experienced it. The agency put the source about 10 km below the surface on the Azuero Peninsula, in the same stretch of central Panama that has been shaking since early October. No tsunami was flagged.

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Three weeks earlier, a far larger quake had damaged buildings and cut roads in this part of the country, so a moderate event here draws attention well beyond its size.

Reading the USGS record for the October 31 event

The USGS event page lists the quake as a moment-magnitude solution of 5.2, located at roughly 7.57 degrees north and 80.25 degrees west, with the status marked reviewed after seismologists checked the automatic solution. The machine-readable detail feed adds that 167 stations contributed to the location, that the event carries a significance score of 429, and that its tsunami flag is zero. The community intensity from the USGS community felt-report system settled at 5.4 on the 12-step scale, which describes moderate shaking, though only 28 respondents had filled in forms when the feed was last updated.

Felt-report counts in thinly populated parts of the Azuero Peninsula stay small even when shaking is widely noticed, because the system depends on people visiting the website and describing what happened. A figure of 28 is best read as a floor.

The Azuero Peninsula bulges into the Pacific from Panama’s southwestern flank and takes in Los Santos and Herrera provinces, where cattle ranches, small towns and fishing communities sit on or near the faults that have been active this month. Bajo Corral lies in Los Santos Province. A shallow focus under a rural landscape produces a pattern seen often in Central America, in which a quake strong enough to rattle windows and wake sleepers rarely injures anyone, but can crack older walls that have already absorbed earlier shocks.

The October 9 magnitude 7.7 mainshock and its aftershock zone

The reason this 5.2 matters sits in the catalog. The USGS recorded a magnitude 7.7 earthquake 12 km west-southwest of Pitaloza Arriba on October 9, 2026, at a depth of about 12.6 km, and more than 2,000 people reported feeling it. The shallow depth explains much of the damage that followed. Faults that rupture this close to the surface send strong shaking into nearby towns with little attenuation, and Panamanian houses and churches built from masonry and adobe tend to suffer first.

Reporting from AFP, carried by the Kuwait Times, described roads that had collapsed completely, in the words of President Jose Raul Mulino, and a town, Tonosi, that rescuers could reach only by air according to Health Minister Fernando Boyd. More than 80 aftershocks had been counted in the first hours, one of them above magnitude 6.0. Two people were reported injured and no deaths were confirmed in that early account.

The Pan American Health Organization followed with situation reports. Report 2, dated October 14, covered 138 health facilities, and report 3, dated October 18, covered 219. Both cite the University of Panama’s Institute of Geosciences, which measured the October 9 event at magnitude 7.5 and 4 km deep, a different figure from the USGS solution but the same earthquake.

A catalog query run for this article shows how active the area has stayed. The USGS count service returned 101 events of magnitude 4.5 or larger between roughly 6 and 9 degrees north and 79 and 82 degrees west from October 9 through the end of October, a box that includes the mainshock itself. Another notable shock came on October 27, when Panamanian civil protection crews checked bridges and schools after a quake near Santiago in Veraguas that agencies rated between 5.0 and 5.7, according to Minuto60, with no injuries reported.

What a 5.2 can and cannot show seismologists

On the energy scale, a magnitude 7.7 releases about 5,600 times more energy than a 5.2, so the October 31 quake is a minor release inside a larger system. Events like it typically mark the crust adjusting after a large rupture, and the USGS records retrieved for this article do not label the Bajo Corral event an aftershock. The timing and location fit that pattern, yet the agency has not said so in the pages read.

Magnitude scales also differ between agencies, which explains why Panamanian and American numbers for the same event rarely match to the decimal. The USGS uses a moment-magnitude (mww) solution from worldwide waveforms, while a national institute can rely on its own dense local network and a different scale, so a gap of 0.2 for the October 9 event is ordinary. Readers comparing the 5.2 here with local bulletins should expect a few tenths of difference, and neither figure is wrong.

Residents in Los Santos and Herrera have reason to keep checking structures already weakened on October 9. The open question is whether the monthly count of magnitude 4.5 and larger events, now at 101, keeps climbing past November or flattens, and the USGS catalog will answer it one reviewed event at a time.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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