Santorini, the beautiful Greek island famous for its white-washed buildings and stunning sunsets, has recently been experiencing a series of earthquakes. These tremors are believed to be connected to the underwater volcano, Kolumbo, located just northeast of the island.
This situation has caused concern among residents, tourists, and scientists and these are growing as seismic activity is increasing. And this can probably mean one thing, especially with the frequent Santorini earthquakes.
Recent Earthquake Activity
Since early February 2025, Santorini and nearby islands like Amorgos and Ios have been shaken by numerous earthquakes. Over 550 tremors have been recorded, with some occurring as frequently as every 10 minutes. The strongest of these quakes reached a magnitude of 5.0. This constant shaking has understandably led to widespread concern about the ongoing Santorini earthquake.
The epicenters of these quakes are primarily located in the sea area between Santorini and Amorgos. While many of the tremors are minor, their frequency and proximity have caused unease among the island’s inhabitants and visitors.
The European Mediterranean Seismological Center has been gathering data about the Santorini earthquakes, and you can see how the magnitude has fluctuated over the past few weeks.
Understanding Kolumbo: The Underwater Volcano
Kolumbo is an active submarine volcano located about 8 kilometers northeast of Santorini. It is approximately 3 kilometers in diameter, with a crater about 1.5 kilometers wide. The volcano’s peak lies just 10 meters below the sea surface, influencing the Santorini earthquake activity.
Kolumbo’s most notable eruption occurred in 1650. This explosive event resulted in pyroclastic flows that reached Santorini, causing the deaths of around 70 people and numerous livestock due to poisonous gases. The eruption also triggered a tsunami that affected nearby islands up to 150 kilometers away.
Insights From Seismologists and Geologists About the Santorini Volcano
Experts are closely monitoring the situation. Thanasis Ganas, Director of Research at the Geodynamic Institute of Athens, stated that efforts are underway to prepare for worst-case scenarios, including the possibility of a tsunami or volcanic eruption related to the Santorini earthquakes. He emphasized the importance of being prepared, even though the exact evolution of the seismic activity remains uncertain.
Vasilis Karastathis, Director of the Geodynamic Institute of the Athens Observatory, described the quakes as “unusual,” especially given their frequency and the short period over which they have occurred. He noted that while the situation is being closely watched, there is currently no direct evidence linking the seismic activity to imminent volcanic activity.
Evacuations and Emergency Responses in Santorini
The relentless tremors, caused by the Santorini earthquake, have led to a significant exodus from Santorini. Over 9,000 people have fled the island in the past 24 hours, resulting in traffic congestion at the port and airport. Many residents are choosing to sleep in their cars or outdoors due to the constant shaking and fear of building collapses.
Authorities have taken several precautionary measures:
- School closures: Educational institutions on Santorini and nearby islands have been temporarily shut down.
- Emergency deployments: Rescue teams have been dispatched to the region to assist with potential evacuations and provide aid.
- Public warnings: Residents and tourists have been advised to avoid certain areas, especially those near cliffs and the old port, due to the risk of landslides.
These steps aim to ensure public safety as the situation develops.
Assessing the Risk: Is It Safe to Stay on Santorini Right Now?
The safety of remaining on Santorini is a pressing concern for many amidst the ongoing earthquakes. While the frequent earthquakes are alarming, experts currently believe that a major volcanic eruption is unlikely. The seismic activity is primarily attributed to tectonic movements rather than volcanic unrest.
However, the situation remains fluid. Authorities are continuously monitoring the seismic activity and have plans in place should the risk level increase due to the Santorini earthquakes. Residents and visitors are encouraged to stay informed through official channels and adhere to safety advisories.
Potentially Affected Areas: Regional Preparations in Santorini
The impact of a potential volcanic event would not be confined to Santorini alone. Neighboring islands and even parts of mainland Greece could be affected, depending on the scale of the eruption and resulting phenomena like tsunamis related to the Santorini earthquake.
Countries in the region, including Turkey, are reportedly monitoring the situation and preparing for possible scenarios.
The good news is that we do not have a big volcano underwater. Because if we had to worry about a Yellowstone-type supervolcano eruption, that would have been a different ball game!
Should You Evacuate Santorini Now?
The Santorini volcano eruption remains a major concern for residents, tourists, and scientists alike. The island continues to experience frequent earthquakes, most likely linked to the underwater Kolumbo volcano. While experts currently believe a major eruption is not imminent, they are closely monitoring the situation for any signs of increased volcanic activity leading to a Santorini earthquake.
Thousands of people have already left Santorini, and emergency teams are on standby to provide aid and ensure public safety. Although authorities assure that it is still relatively safe to stay on the island, caution is advised. The biggest question now is whether the situation will calm down or escalate into something more serious.
For now, Santorini remains on high alert, and nearby regions, including Turkey, are preparing for potential impacts. Whether or not this event will compare to the devastating 1650 eruption, only time will tell. Until then, keeping an eye on official updates and following safety guidelines remains crucial for anyone on the island during the Santorini earthquake events.
FAQs
What triggered the seismic activity around Santorini?
A swarm of small to moderate earthquakes began in late January 2025 beneath the Aegean Sea near Santorini. The tremors were caused by tectonic fault movement and not by volcanic activity.
How extensive was the earthquake swarm and how strong did it get?
Over 20,000 tremors were recorded within a few weeks, with dozens exceeding magnitude 4.0. The strongest quake reached around magnitude 5.3 in early February.
What emergency measures did Greek authorities take on Santorini?
Authorities declared a state of emergency, closed schools, restricted access to risky areas, and evacuated more than 10,000 residents and tourists using ferries and aircraft.
What is the current situation and outlook for seismic activity?
By the end of February, the frequency and strength of the earthquakes had declined. Many residents have returned, though monitoring continues and some safety restrictions remain in place.