A magnitude 4.7 earthquake struck 1 km south-southeast of Radwanice, a village in southwestern Poland, at 21:00 UTC on Thursday, October 29, 2026. The U.S. Geological Survey placed the focus just 5 kilometres below the surface, shallow enough that the energy had little rock to pass through before reaching the ground. Poland is not a country where a shock of that size is routine.
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The federal catalogue entry carries no felt reports, no damage estimate and a tsunami flag of zero. What it does carry is a precise location in a part of the country with a long, documented history of tremors.
A shallow quake under the copper belt
Radwanice is the seat of its own gmina in Polkowice County in the Lower Silesian Voivodeship, home to about 2,100 residents by the reference count on its encyclopedia page, at roughly 51.56 degrees north and 15.95 degrees east. The county takes its name from Polkowice, the town that anchors a copper-mining district. Two mines operated there by the company KGHM, Polkowice-Sieroszowice and Rudna, appear repeatedly in the record of local seismic events.
The agency’s catalogue feed for October 29 and 30 lists the quake on the mb magnitude scale, which relies on body waves, and its status is “reviewed”, meaning an analyst has checked the automatic solution rather than leaving the first estimate standing. The event page for the October 29 quake gives its significance score as 340, a mid-range number on a scale the agency uses to weigh magnitude, felt reports and expected impact together. The USGS record does not say what caused the rupture, and nothing in it ties the shock to mining. That connection is plausible given the geography, yet it remains an inference until Polish seismologists publish their own analysis.
How uncommon a quake this size is in Poland
The word rare fits the national picture. One tracking site that compiles USGS data reports that Poland has recorded nine earthquakes of magnitude 2.5 or greater so far in 2026, and lists the Radwanice event as the only one in the previous 30 days. The strongest of the year before this one was a magnitude 4.9 shock 2 km west of Polkowice on July 11, 2026. Nine events above that low threshold across ten months is a thin catalogue next to the dozens a seismically active country can log in a single week.
The same list shows how the large ones cluster. The July shock and the October shock both sit in Polkowice County, the same county that holds the copper mines.
A longer timeline in the list of earthquakes in Poland shows that the copper basin has produced nearly every notable modern shock. It records a magnitude 4.7 event at Polkowice on February 27, 2025, felt at intensity V on the Modified Mercalli scale near the epicentre, a magnitude 4.4 tremor at the Rudna mine on November 29, 2016 that killed eight miners, a magnitude 4.6 event at Rudna on March 10, 2013 after which 19 miners were rescued from a collapsed section, and a 1987 event at the Lubin mine that killed four. The strongest quake in the country’s recorded history, from 1443, is estimated at magnitude 6, but historians disagree about whether its epicentre lay in Poland or in Slovakia.
What KGHM said after the last comparable tremor
There is a recent template for how the mining company and the media handle an event like this. After the February 2025 shock, Polish Radio reported that the European-Mediterranean Seismological Centre put the tremor at magnitude 4.2 shortly after 9:19 a.m., that KGHM’s Polkowice-Sieroszowice mine took the strongest of the shaking, and that ten miners were evacuated from it. One person suffered minor injuries. Two weaker aftershocks followed, one at Rudna and one at Polkowice-Sieroszowice.
KGHM’s press office described that activity as a natural rock mass movement, a phrase that sits in tension with the long list of mining-linked events in the region. The same event appears as magnitude 4.2 in one catalogue and 4.7 in another, which illustrates how much agencies can differ on size depending on the scale they apply and the stations they use. Readers comparing the October 29 figure of 4.7 with other agencies’ numbers should expect gaps of a few tenths.
No statement from KGHM or from a Polish geophysical institute about the October 29 event turned up in the sources reachable overnight, so there is no named official on record for this particular shock. Whether any mine crews were underground at 22:00 local time, when the quake struck, is likewise not documented in what was available.
The open question is which of the two descriptions the Radwanice event will earn. If Polish seismologists classify it as a mining-induced event, it would be the third shock of at least magnitude 4.7 in the Polkowice area since February 2025, after that month’s event and the July 2026 magnitude 4.9. If they call it tectonic, it would be a harder case to explain, because the nearest comparable natural shock on the Wikipedia list struck Polkowice in July 2020 at magnitude 4.9.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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