6.0-Magnitude Earthquake Strikes Cuba Amid Blackout

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March 17, 2026 Hour: 7:42 am

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Tremor felt in eastern provinces as power failure leaves millions without phone service and Internet.

Cuba was struck early Tuesday by a 6.0-magnitude earthquake felt in the provinces of Guantanamo and Santiago de Cuba, coinciding with a widespread blackout that left most of the island without electricity, phone service and internet access.

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Cuba’s National Center for Seismological Research (CENAIS) reported the quake had its epicenter at sea and was felt at 12:28 a.m. local time, “at a depth of 20 kilometers, with a magnitude of 6.0 and located 37 kilometers southeast of Imias, in Guantanamo province.”

The U.S. Geological Survey (USGS), which monitors seismic activity worldwide, reported two tremors: one measuring 5.8 at 12:28 a.m. at a depth of 11.6 kilometers, and another measuring 4.7 sixteen minutes later at a depth of 10 kilometers. The European-Mediterranean Seismological Centre (EMSC), for its part, reported a 5.8-magnitude earthquake followed by another measuring 4.1.

A failure in Cuba’s National Electric System (SEN), the causes of which are still under investigation, left more than 9 million people without power on Monday in the country’s sixth nationwide blackout in a year and a half.

Even before this latest disconnection, the situation in Cuba was already critical, with outages lasting about 15 hours a day in Havana and continuous power cuts of up to two days in other provinces.

teleSUR/ JF

Source: EFE