Is seismic activity in Santorini on the decline and what is the plan? Earthquake insurance for risk areas is becoming increasingly difficult to obtain in Greece and support is required for the holiday paradise.
The seismic activity in Santorini has been decreasing recently. The most significant tremor recorded over the past day reached 3.8 on the Richter scale, occurring on Friday, 21 February.
This trend offers some relief to the residents of Santorini and the broader Cyclades region, who have been experiencing frequent shakes.
Local schools and the Ministry of Climate Crisis have been actively involved in ensuring safety through various preventive measures.
Inspections are being conducted to assess the structural integrity of buildings, especially in school areas.
Experts, including Professor Evi Nomikou, are monitoring the situation closely, focusing on the volcanic activity that could impact the community.
Earthquakes in Santorini: Key Committees Convene Today
Residents of Santorini are gradually resuming their daily routines amid recent seismic activity. Those who temporarily left the island due to safety concerns are returning.
Local authorities are actively monitoring the situation to ensure the community’s safety and well-being.
Daily assessments of public buildings are underway, conducted by expert teams in structural integrity.
Teams from the technical chamber recently completed detailed inspections of the island’s schools.
Their findings will help categorise these structures according to their need for repairs. This will inform decisions on whether renovations are necessary to ensure safety standards.
The safety assessments of these public buildings are crucial in preparing for the reopening of schools.
Today, two key committees responsible for risk evaluation and safety measures are convening.
High on the agenda is the potential lifting of current restrictions and whether a safe reopening of schools is possible next Monday.
The committees include experts from various disciplines, such as seismologists and risk assessors, ensuring a comprehensive approach to decision-making.
Recent seismological studies have highlighted the activity around Santorini, especially the presence of faults and tectonic movements.
The seismological landscape includes monitoring of tremors, which have raised concerns among experts such as Vasilis Karastathis and Gerasimos Papadopoulos.
Both scientists stress the importance of studying the seismic data to evaluate any possible threats.
Their insights into the island’s geological dynamics are critical for forecasting potential events.
The Geodynamic Institute is playing a central role in analysing seismic risks, supported by insights from experts, such as Efthymios Lekkas and Kostas Papazachos.
There is an emphasis on understanding the complexities of the surrounding area and maintaining constant vigilance.
Keeping the risk of stronger earthquakes in mind is essential for preparedness.
One significant concern is the activity of the undersea Columbo volcano, which has shown signs of renewed motion.
Its magma chamber and potential for future eruptions are closely monitored.
This points to the need for ongoing observation and threat assessment to mitigate the hazards posed to residents and infrastructure.
Another important figure, Akis Tselentis, advises readiness and response strategies.
He emphasises using scientific data to forewarn and educate the public about possible seismic occurrences.
Authorities are focused on implementing strategies to manage both short-term and potential long-term risks.
The possible occurrence of stronger tremors necessitates proactive strategies as suggested by experts.
The collaboration of organisations like OASP (Organisation for Earthquake Protection and Planning) ensures a coordinated response framework.
The agencies work towards improving readiness and resilience against possible future quakes.
Over 22,000 Earthquakes
Recent seismic activity has been notable in the Santorini-Amorgos region, with more than 22,600 earthquakes recorded between 26 January and 19 February 2025.
This significant number emphasises the ongoing seismicity in this area.
Unlike a single large volcanic eruption, this activity is marked by numerous smaller tremors over several weeks, indicating the complex nature of tectonic and volcanic interactions.
Gradual Decline in Activity
Seismic activity in the region has demonstrated a gradual decline. Both the daily frequency of quakes and the maximum magnitudes have decreased over time.
Since 15 February, there has been no noticeable uptick in minor tremors.
Such declines can suggest that tectonic stress might be dispersing, but close monitoring is still essential to anticipate any surprises.
Potential for Landslides
Landslide on Santorini (Video: Konstantinos Davarinos)
Post-seismic events often bring about secondary concerns, such as landslides, which remain a significant risk in Santorini.
Even after the seismic activity ceases, heavy rainfall can serve as a catalyst, triggering these movements.
Areas with varying erosion rates are particularly vulnerable, where softer rocks erode faster, leaving sturdier formations that may eventually collapse.
One concerning example is the volcanic lava, which can become destabilised without sufficient support from underlying rock layers.
The threat is real and requires continuous observation and preparations to mitigate risks.
Tectonic and Volcanic Dynamics
The interplay between tectonic shifts and volcanic activity is evident in this region.
The earthquakes often originate from volcanic activity or undersea fault lines. The focus depth of these tremors varies, which adds complexity to understanding their origins and potential impacts.
Term |
Explanation |
|---|---|
Seismicity |
The occurrence and frequency of earthquakes in a region. |
Richter Scale |
A logarithmic scale used to measure the magnitude of earthquakes. |
Tremor |
A shaking or vibration usually caused by tectonic movements. |
Volcano |
An opening in the Earth’s surface that can erupt with lava, gas, and ash. |
Epicentre |
The point on the Earth’s surface directly above the focus of an earthquake. |
Seismic Sequence |
A series of related seismic events in a particular region over a short period. |
Caldera |
A large, basin-like depression resulting from the collapse of a volcano. |
Microseisms |
Small, low-intensity earthquakes that can occur upriver during large seismic events. |
Focus Depth |
The depth below the Earth’s surface where an earthquake starts. |
Volcanic Eruption |
The release of gas, dust, lava, or other materials from a volcano. |
Observed Effects and Preparations
The ongoing calderas and emergence of minor seismic tremors highlight the diverse nature of geological conditions here.
Underwater faults and volcanic activity create challenging scenarios for predicting exact impacts or future seismic sequences.
Santorini’s geological stability relies significantly on monitoring efforts and adaptation strategies.
Effective preparation involves understanding potential risks from volcanic explosions and other seismic movements.
Given the region’s dynamic state, staying vigilant and improving predictive measures are vital.
Notably, scientific assessments and expert committees play crucial roles in assessing seismicity, offering insights and recommendations that address potential threats.
Their continuous evaluation of seismic sequences, coupled with technological advancements, enhances preparedness efforts.
Earthquake Insurance for Risk Areas is Becoming Rarer
In recent years, property owners in certain regions have encountered an unwelcome surprise when renewing their insurance policies.
Previously, these policies often covered a wide range of risks including earthquakes.
However, many insurance companies have started excluding earthquake coverage, especially after reports of increased seismic activity in areas like Santorini and Amorgos.
This change is largely a response to the heightened seismic movements observed over several weeks.
Insurers have deemed it too risky to continue offering earthquake coverage in these conditions.
As a result, policies are excluding this type of protection even though it was once a standard inclusion.
The new trend impacts several islands.
Beyond Santorini and Amorgos, other islands like Paros, Naxos, Ios, and Anafi face similar exclusions.
In the past, insurance contracts might contain special arrangements or exceptions, often depending on factors like the building’s age or the magnitude of past earthquakes.
Now, these specific adjustments have given way to more general exclusions.
Officials from insurance associations, while not commenting directly on individual company policies, highlight a key principle of the industry.
Insurance typically comes into play before a risk escalates, not during or after the event.
This principle is being strictly applied to regions with active seismic threats.
Insurance Trends and Factors
Premium costs for earthquake insurance also depend on various factors. Homes in high-risk zones usually face higher premiums.
According to FEMA, only a small percentage of Californians, despite being in a quake-prone state, hold earthquake insurance. This is partly due to pricey premiums driven by the elevated risk.
Additionally, unlike California, where some have opted out of costly coverage, property owners in regions like the Cyclades find themselves forced into this decision by insurance companies themselves.
In these cases, the potential for natural disasters has directly influenced the availability and terms of coverage options.
The Bigger Picture
Globally, the insurance market also reflects this trend. A study showing only about 40% of losses from major disasters being covered by insurance highlights this issue.
Countries like China, in particular, indicate a gap between insured and actual losses, with only 10% coverage for major events.
For homeowners who seek to understand their options, reviewing the specifics of their region’s risk profile is essential. Evaluating the age and safety features of their homes can also help in seeking more affordable protection where possible.
Homeowners can find flexibility by adjusting coverage to reflect the evolving risks presented by increased seismic activities.
Support for Santorini demanded
Seismic activities have been unsettling the Cyclades region, especially impacting Santorini. This situation has disrupted the economic balance of these islands, which rely heavily on tourism.
In response, the Union of Tourism and Catering of Thira, Santorini, is advocating for necessary interventions. They are planning a protest outside the Ministry of Labour and Social Security in Athens on 24 February.
This demonstration also includes discussions with ministry officials to push for comprehensive support measures tailored for the Southern Cyclades community.
The main demands include income stability and safeguarding of labour and social security rights for workers in the tourism sector.
These measures are deemed essential as long as the state of emergency persists.
The union is also seeking an extension of unemployment benefits for February and March, alongside economic aids such as rent subsidies and suspending payments for utilities, taxes, and mortgage loans.
Further, there is a call for enhanced emergency response services, which involves public information campaigns and setting up safe zones for evacuation.
The union proposes free transportation for locals when required and underscores the need for reinforcing local healthcare with additional personnel and medical supplies.
Another significant concern is the urgent implementation of an earthquake safety inspection programme. This initiative aims to identify and mitigate risks in buildings, ensuring the safety of residents and visitors alike.
In parallel, the Greek government is contemplating a support package for Santorini.
This measure is intended to mitigate the economic impact if seismic activities continue for a prolonged period. Should these conditions extend beyond Easter, the financial relief plan would likely be rolled out, addressing the economic uncertainties faced by the island’s residents and workforce.
Frequently Asked Questions
Earthquakes Updates in the Aegean
Recent earthquakes in the Aegean
Advice for Tourists During an Earthquake in Santorini
Tourists are advised to stay calm and seek open spaces if outside, or take cover under sturdy furniture indoors during an earthquake.
Following instructions from local authorities and emergency services is crucial for safety.
Information from the Greek Civil Protection for earthquakes (in English)
What are the common reasons for earthquakes in Santorini?
Santorini is located on a significant fault line contributing to its frequent seismic activity. The movement of tectonic plates in this region often leads to earthquakes.
Additionally, volcanic activity in the area plays a role, as the island is part of a volcanic arc known for generating seismic events.
How is volcanic activity tracked on Santorini?
The monitoring of volcanic activity on Santorini involves a network of seismic stations and other geological tools.
These provide real-time data on ground movements and volcanic gas emissions.
Scientists use this data to track any changes in the volcano’s behaviour and to predict potential eruptions.
What systems exist for early earthquake warnings in Santorini?
Santorini has implemented several measures for early earthquake warnings, including advanced seismic monitoring systems.
These systems aim to detect earthquakes rapidly and provide timely alerts to the authorities and the public. Emergency response plans are also in place to address potential seismic threats.
How frequently does Santorini experience earthquakes?
The region of Santorini experiences seismic events fairly often, ranging from minor tremors to more significant earthquakes.
The frequency can vary, with periods of increased activity due to shifts in the tectonic plates and volcanic processes.
What should tourists keep in mind about earthquake risks in Santorini?
Visitors to Santorini should be aware of the island’s susceptibility to seismic events. It is advisable to familiarise themselves with local safety procedures and emergency contacts.
While the risk of a major earthquake is ever-present, many measures are in place to ensure visitor safety.
How does Santorini’s geology influence its seismic activity?
The geological structure of Santorini, which includes volcanic formations and fault lines, significantly influences its seismic characteristics.
The movement along these faults, combined with the volcanic activity beneath the island, results in frequent tremors and earthquakes in the region.
