The Earth Shook: the Most Significant Earthquakes of the Past Month

A magnitude 4.1 earthquake near the tiny town of Cowles, Nebraska felt like a scene from the wrong century — earthquakes simply do not happen in Nebraska, or so the cultural imagination insists. Nearly 1,890 people felt this one, rattling windows across Kansas, Nebraska, and Colorado and sending a wave of bewilderment across social media. The USGS significance score of 819 dramatically outweighs what the 4.1 magnitude alone would suggest, a direct consequence of the density of felt reports pouring in from a region where residents had no reference experience for what was happening. Shallow at just 3 km depth, the event was preceded by a swarm of smaller tremors.

A magnitude 5.5 earthquake struck just 2 km south-southeast of Rodotopi in northwestern Greece on 4 March 2026, triggering a yellow USGS alert for potential casualties. Greece sits on one of the most seismically active collision zones in Europe — the interface between the Eurasian and African plates runs directly beneath the country, and the region around Epirus and northwestern Macedonia experiences damaging earthquakes every few decades. With a shallow focal depth of just 10 km and an MMI (maximum instrumental intensity) of nearly 7, this event caused significant shaking across a wide area. Twenty-five people reported feeling it directly to USGS, with community intensity measurements peaking at almost 6.

Chile is one of the most seismically active countries on Earth — it occupies the central section of the South American subduction zone, where the Nazca Plate dives beneath the continent at a rate of about 7 cm per year. This magnitude 6.3 earthquake, striking 85 km west of the coastal city of Vallenar on 9 March 2026 at a shallow depth of 10 km, was felt by at least 29 people and generated an MMI of nearly 6. The Atacama region of Chile has been rattled by numerous significant earthquakes throughout history, including the 1922 Atacama earthquake (magnitude 8.5) that generated a Pacific-wide tsunami. Green alert status meant no major casualties were expected.

A magnitude 6.4 earthquake struck 224 km east-southeast of Attu Station at the extreme western tip of the Aleutian Islands on 3 March 2026, generating both a tsunami assessment and a green USGS impact alert. The Aleutian Islands arc is an almost unbroken chain of volcanic islands marking the boundary where the Pacific Plate subducts beneath North America — a tectonic arrangement responsible for producing some of the largest earthquakes in recorded history, including the 1965 Rat Islands earthquake (9.2) and the 1964 Good Friday earthquake (9.2) near Anchorage. This event struck at 10 km depth and was strong enough to prompt tsunami advisories across the North Pacific.

A magnitude 6.3 earthquake struck 181 km southeast of Kirakira in the Solomon Islands on 3 March 2026, prompting a tsunami assessment due to the submarine setting and magnitude threshold. The Solomon Islands archipelago lies in one of the most geologically complex regions in the Pacific — the triple junction between the Pacific, Australian, and North Bismarck plates creates a seismic environment of exceptional complexity. The islands were devastated by the 2007 Solomon Islands earthquake (8.1) and associated tsunami, which killed dozens and displaced thousands. This 2026 event occurred at a relatively shallow depth of 8.7 km, maximising its potential for seafloor displacement.

A magnitude 5.0 earthquake struck just 23 km south-southeast of the city of Satkhira in southwestern Bangladesh on 2 March 2026, triggering a yellow USGS alert that reflected genuine concern for casualties in one of the world's most densely populated countries. Bangladesh sits on a complex tectonic boundary — the northeastern Indian subcontinent is being slowly compressed and uplifted by the collision with Asia, and the Chittagong Hill Tracts region generates periodic damaging earthquakes. A shallow focal depth of 10 km combined with densely built low-rise construction in the Khulna Division makes even a moderate event potentially dangerous. The USGS estimated a maximum instrumental intensity of nearly 7 — strong enough to cause some structural damage.

A powerful magnitude 7.1 earthquake struck 55 km north-northwest of Kota Belud in the Malaysian state of Sabah on Borneo Island on 24 February 2026. The event occurred at the extraordinary depth of 619 km — a deep-focus earthquake within the subducting slab of the Sunda Plate far below the surface — which significantly attenuated the shaking felt at the surface. Nevertheless, 58 people reported feeling the event across Sabah and the southern Philippines, and a tsunami assessment was triggered by the magnitude threshold. Sabah has experienced devastating shallow earthquakes before — the 2015 Ranau earthquake (6.0) killed 18 people and triggered a deadly rockslide on Mount Kinabalu.

A magnitude 6.4 earthquake struck 48 km west of Port-Olry on Espiritu Santo island in Vanuatu on 17 February 2026, generating a tsunami assessment due to its position at 43 km depth beneath the ocean floor. Vanuatu is one of the most earthquake-prone nations on Earth, sitting directly above the subduction zone where the Australian Plate dives beneath the Pacific Plate at the New Hebrides Trench. The archipelago experiences multiple major earthquakes every year, and its remote island communities have developed some of the most sophisticated traditional early warning systems in the Pacific. This event produced an estimated maximum instrumental intensity of 6.2 — significant enough to cause concern for coastal communities.

A second significant Chilean earthquake this month struck 29 km southwest of Ovalle in the Coquimbo Region on 16 February 2026 — just three weeks before the larger Vallenar event would rattle the same stretch of coastline. At 40 km depth, this event was slightly deeper than its follow-up, but still shallow enough to generate strong shaking: USGS estimated a maximum instrumental intensity of nearly 6, and 126 people reported feeling it. The Coquimbo Region was devastated by the 2015 Illapel earthquake (8.3) and resulting tsunami, which affected coastal communities across the Pacific. Two significant earthquakes in the same coastal stretch within a month is a reminder that Chile's seismic activity rarely respects the calendar.

A magnitude 4.1 earthquake near the tiny town of Cowles, Nebraska felt like a scene from the wrong century — earthquakes simply do not happen in Nebraska, or so the cultural imagination insists. Nearly 1,890 people felt this one, rattling windows across Kansas, Nebraska, and Colorado and sending a wave of bewilderment across social media. The USGS significance score of 819 dramatically outweighs what the 4.1 magnitude alone would suggest, a direct consequence of the density of felt reports pouring in from a region where residents had no reference experience for what was happening. Shallow at just 3 km depth, the event was preceded by a swarm of smaller tremors.

A magnitude 5.5 earthquake struck just 2 km south-southeast of Rodotopi in northwestern Greece on 4 March 2026, triggering a yellow USGS alert for potential casualties. Greece sits on one of the most seismically active collision zones in Europe — the interface between the Eurasian and African plates runs directly beneath the country, and the region around Epirus and northwestern Macedonia experiences damaging earthquakes every few decades. With a shallow focal depth of just 10 km and an MMI (maximum instrumental intensity) of nearly 7, this event caused significant shaking across a wide area. Twenty-five people reported feeling it directly to USGS, with community intensity measurements peaking at almost 6.

Chile is one of the most seismically active countries on Earth — it occupies the central section of the South American subduction zone, where the Nazca Plate dives beneath the continent at a rate of about 7 cm per year. This magnitude 6.3 earthquake, striking 85 km west of the coastal city of Vallenar on 9 March 2026 at a shallow depth of 10 km, was felt by at least 29 people and generated an MMI of nearly 6. The Atacama region of Chile has been rattled by numerous significant earthquakes throughout history, including the 1922 Atacama earthquake (magnitude 8.5) that generated a Pacific-wide tsunami. Green alert status meant no major casualties were expected.

A magnitude 6.4 earthquake struck 224 km east-southeast of Attu Station at the extreme western tip of the Aleutian Islands on 3 March 2026, generating both a tsunami assessment and a green USGS impact alert. The Aleutian Islands arc is an almost unbroken chain of volcanic islands marking the boundary where the Pacific Plate subducts beneath North America — a tectonic arrangement responsible for producing some of the largest earthquakes in recorded history, including the 1965 Rat Islands earthquake (9.2) and the 1964 Good Friday earthquake (9.2) near Anchorage. This event struck at 10 km depth and was strong enough to prompt tsunami advisories across the North Pacific.

A magnitude 6.3 earthquake struck 181 km southeast of Kirakira in the Solomon Islands on 3 March 2026, prompting a tsunami assessment due to the submarine setting and magnitude threshold. The Solomon Islands archipelago lies in one of the most geologically complex regions in the Pacific — the triple junction between the Pacific, Australian, and North Bismarck plates creates a seismic environment of exceptional complexity. The islands were devastated by the 2007 Solomon Islands earthquake (8.1) and associated tsunami, which killed dozens and displaced thousands. This 2026 event occurred at a relatively shallow depth of 8.7 km, maximising its potential for seafloor displacement.

A magnitude 5.0 earthquake struck just 23 km south-southeast of the city of Satkhira in southwestern Bangladesh on 2 March 2026, triggering a yellow USGS alert that reflected genuine concern for casualties in one of the world's most densely populated countries. Bangladesh sits on a complex tectonic boundary — the northeastern Indian subcontinent is being slowly compressed and uplifted by the collision with Asia, and the Chittagong Hill Tracts region generates periodic damaging earthquakes. A shallow focal depth of 10 km combined with densely built low-rise construction in the Khulna Division makes even a moderate event potentially dangerous. The USGS estimated a maximum instrumental intensity of nearly 7 — strong enough to cause some structural damage.

A powerful magnitude 7.1 earthquake struck 55 km north-northwest of Kota Belud in the Malaysian state of Sabah on Borneo Island on 24 February 2026. The event occurred at the extraordinary depth of 619 km — a deep-focus earthquake within the subducting slab of the Sunda Plate far below the surface — which significantly attenuated the shaking felt at the surface. Nevertheless, 58 people reported feeling the event across Sabah and the southern Philippines, and a tsunami assessment was triggered by the magnitude threshold. Sabah has experienced devastating shallow earthquakes before — the 2015 Ranau earthquake (6.0) killed 18 people and triggered a deadly rockslide on Mount Kinabalu.

A magnitude 6.4 earthquake struck 48 km west of Port-Olry on Espiritu Santo island in Vanuatu on 17 February 2026, generating a tsunami assessment due to its position at 43 km depth beneath the ocean floor. Vanuatu is one of the most earthquake-prone nations on Earth, sitting directly above the subduction zone where the Australian Plate dives beneath the Pacific Plate at the New Hebrides Trench. The archipelago experiences multiple major earthquakes every year, and its remote island communities have developed some of the most sophisticated traditional early warning systems in the Pacific. This event produced an estimated maximum instrumental intensity of 6.2 — significant enough to cause concern for coastal communities.

A second significant Chilean earthquake this month struck 29 km southwest of Ovalle in the Coquimbo Region on 16 February 2026 — just three weeks before the larger Vallenar event would rattle the same stretch of coastline. At 40 km depth, this event was slightly deeper than its follow-up, but still shallow enough to generate strong shaking: USGS estimated a maximum instrumental intensity of nearly 6, and 126 people reported feeling it. The Coquimbo Region was devastated by the 2015 Illapel earthquake (8.3) and resulting tsunami, which affected coastal communities across the Pacific. Two significant earthquakes in the same coastal stretch within a month is a reminder that Chile's seismic activity rarely respects the calendar.