A 5.0-magnitude earthquake in southern Iran and a stronger 6.1-magnitude quake off Cuba’s coast triggered concern on Tuesday, with tremors reportedly felt as far as parts of Mexico and Florida. Authorities in both countries were monitoring the situation, though no major casualties or widespread damage had been reported at the time of writing.

Quakes Hit Hours Apart

Two separate earthquakes struck different parts of the world within hours of each other, drawing attention to seismic activity across the Caribbean and the Middle East.

According to Iranian state media, a magnitude 5.0 earthquake struck near Sargaz in Hormozgan province early Tuesday morning. The tremor occurred at a depth of 22 kilometres. Officials said monitoring teams were assessing the affected areas, though there were no immediate reports of significant damage.

Around the same period, a stronger magnitude 6.1 earthquake occurred off the coast of Cuba. The German Research Center for Geosciences (GFZ) reported that the quake struck at a relatively shallow depth of 10 kilometres beneath the seabed.

Tremors Reach Mexico, Florida

The Cuban earthquake was felt across a wider region, including parts of Mexico and the US state of Florida, areas that are not typically associated with noticeable seismic activity from Caribbean events.

Seismologists noted that the quake was unusual because it occurred within a tectonic plate rather than along a major plate boundary. Such earthquakes tend to be less frequent and more scattered, making the event noteworthy from a geological perspective.

Residents in several locations reported feeling light shaking, although authorities had not issued any tsunami warnings or emergency alerts linked to the earthquake.

Strongest Nearby Cuban Quake In Decades

Experts described the Cuban event as one of the most significant earthquakes recorded in the area in recent history.

Data reviewed by seismologists indicated that no earthquake of comparable strength had occurred within roughly 322 kilometres of the latest epicentre since 1880. Historical records show that a magnitude 6.0 earthquake struck near San Cristobal in western Cuba more than a century ago.

The comparison has heightened interest among researchers studying seismic patterns in the Caribbean basin.

Infrastructure Concerns In Cuba

While there were no confirmed reports of large-scale destruction, the earthquake raised concerns because of Cuba’s ageing infrastructure.

Many buildings across the country have suffered from decades of limited maintenance and economic hardship. In some areas, communication challenges were also reported due to ongoing power outages that have affected parts of the island in recent months.

Local authorities continued inspections to determine whether any structural damage had occurred in vulnerable neighbourhoods.

Iran’s Seismic Vulnerability

Iran remains one of the world's most earthquake-prone nations due to its location across several active fault systems.

The country experiences frequent seismic activity as major tectonic plates interact beneath the region. Although Tuesday’s earthquake was moderate in strength, officials routinely monitor such events because even smaller tremors can cause damage in densely populated or vulnerable areas.

Emergency services remained on alert as assessments continued in Hormozgan province.

Why Earthquakes Occur

Earthquakes happen when energy stored within the Earth's crust is suddenly released. This typically occurs along fault lines, where sections of rock move after stress has accumulated over time.

The Earth's outer layer is divided into tectonic plates that are constantly shifting. When these plates collide, separate, or slide past one another, pressure builds up. Once that pressure exceeds the strength of surrounding rocks, it is released as seismic waves, causing the ground to shake.

Scientists continue to study these processes to improve earthquake monitoring and preparedness systems worldwide.

Monitoring Continues

Authorities in both Iran and Cuba said monitoring efforts would continue as aftershocks remain possible following significant seismic events. Emergency agencies have urged residents to remain alert, while geological agencies continue to analyse data from the twin earthquakes that drew attention across multiple regions on Tuesday.