La Palma, in the Canary Islands, has been rocked by dozens of small tremors measuring between 1.5 and 2.7 on the Richter scale.
And it could well be a sign that the active volcano Cumbre Vieja could be set to cause devastation.
Panic has spread among the 86,000 residents on the island after the largest tremor hit on Saturday afternoon, approximately 17.4 miles below ground.
Cumbre Vieja could be about to erupt
One of a number of craters on the volcanically active ridge of the Cumbre Vieja
It measured 2.7 on the Richter scale, and was followed almost exactly 24 hours later by a magnitude 2.6 tremor, before a third of 2.1 hit on Monday at midnight.
Despite the frequency of tremors, residents and tourists staying on the island did not feel the earthquakes - due to their depth underground.
The volcano's last two eruptions occurred in 1949 and 1971, a gap of just 22 years.
La Palma residents are panicking about the potential impact of the volcano
La Palma island in Canary Islands, Spain
But this doesn't mean another eruption is due, as previous to these two dates, the last historical eruption occurred in 1712.
If it was to blow, Cumbre Vieja could cause a mega tsunami . Some experts believe the volcano is in the initial stages of failure, meaning a big enough eruption could cause a massive landslide to enter the Atlantic Ocean.
It could result in waves as high as 600m, travelling at around 450mph meaning the African coast would be submerged within an hour, and the southern coastlines of the British Isles in just three and a half hours.