For about two seconds on Monday night, July 6, 2026, some residents of Ushuaia felt the ground tremble. That was all. The earthquake that caused it was a magnitude 5.9 event in the Drake Passage, 303 kilometers away, and it struck at 22:26 Argentine time.
People living near the coast of Ushuaia told local media they felt a brief vibration, especially around the Banderas roundabout, the CADIC area and Avenida Hipólito Yrigoyen. No injuries or material damage were reported. The city government told residents there was no alert in force and that the quake had happened far enough away to pose no danger. Civil Defense said it had no effect on the southern part of Tierra del Fuego, Antarctica and the South Atlantic Islands, and no tsunami alert was issued.
Why a distant quake gets felt
Here’s what the depth means in plain terms. The quake began 10 kilometers down, which is shallow. El Litoral noted that a shallow focus tends to make a tremor feel stronger at the surface, though distance blunted that here. Think of it like a drum struck at the far end of a long hall: the sound is the same drum, but it arrives softer.
The Drake Passage sits on the boundary between the South American plate and the Scotia plate, a region of intense tectonic activity. The main structure is the Fagnano-Magallanes fault, which crosses the main island of Tierra del Fuego from west to east, passes Lake Fagnano and carries on toward the Drake Passage through the North Scotia Arc. Because the two areas share the same tectonic origin, some quakes out at sea can be felt in Ushuaia and other towns in southern Patagonia. Specialists say the Scotia plate creeps east at between 5.4 and 6 millimeters a year relative to the South American plate. That slow motion stores up stress, and the stress is released now and then as earthquakes.
A rough stretch of sea
The passage has another reputation. TN described it as one of the most dangerous shipping corridors in the world because of its weather, with waves of up to 15 meters common and more than 25 meters possible in severe storms. The earthquake did not change navigation conditions in the area, according to Noticias Ambientales.
Authorities kept watching. Civil Defense said it was monitoring seismic activity together with the Río Grande Astronomical Station, and it asked residents to rely only on official channels to avoid false reports. The emergency lines 103 and 911 stayed open.
Sources
- Un sismo de magnitud 5,9 en el Pasaje Drake se sintió en Ushuaia (El Litoral)
- Un sismo de magnitud 5,9 sacudió a varias ciudades de Tierra del Fuego (TN)
- 5.9 magnitude earthquake in the Drake Passage slightly shakes Ushuaia without causing damage or tsunami risk (Noticias Ambientales)
