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A light magnitude 4.3 earthquake struck 96 km SSW of Severo-Kuril’sk, Russia on Tuesday, August 25, 2026 at 02:45:06 PM UTC. This intermediate focal depth (73.9 km depth) released energy equivalent to approximately 43 tons of TNT. Here is the verified US telemetry, live epicenter map, and ground shaking assessment.
(96 km SSW of)4.3MB
Light Seismic Class
73.9km
Upper Mantle
49.838° N, 155.796° E
GPS Coordinates
43 tons
TNT Equivalent Power
US
USGS Real-time Feed
A magnitude 4.3 event is classified as a light earthquake. Noticeable shaking of indoor objects and rattling doors/windows. Generally causes none to slight non-structural damage in older buildings.
Felt indoors. Hanging objects swing slightly. Vibration like a passing light truck.
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Earthquake strength is measured on a logarithmic scale. Compare this event with the full seismic scale:
Because seismic scales are logarithmic, each whole integer increase represents:
Russia's seismicity is fundamentally governed by its tectonic setting: Pacific Plate subducting beneath the Okhotsk/North American Plate along the Kuril-Kamchatka Trench at ~80 mm/year, plus the active Baikal continental rift zone. Major regional fault structures include Kuril-Kamchatka Trench, Baikal Rift Zone, Greater Caucasus Thrust Faults.
Originating at a depth of 73.9 km (Upper Mantle / Wadati-Benioff Zone (70–300 km)), this rupture occurred originated within the descending oceanic plate inside the upper mantle. shaking radiates over a wider geographic area with attenuated high frequencies.
Seismologists note that minor aftershocks remain common in the 24 to 48 hours following tremors of magnitude 4.3. According to statistical seismic models, there is roughly a 5% probability of a subsequent event of equal or greater strength occurring in the same fault zone. Residents in Russia are advised to check living spaces for unsecured items.
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