The 10 earthquakes that have marked Granada since 1979: from the swarm to the double 4.8

Granada has experienced since 1979 shallow earthquakes, swarms with thousands of movements, and even an exceptional earthquake originating more than 600 kilometers deep. From the long series of Fuente Vaqueros to the double earthquake of magnitude 4.8 in August 2026, these are the ten episodes that explain why the province has never really stopped shaking.

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The earthquakes of magnitude 4.8 recorded in Alhendín and Gójar have returned to Granada a familiar feeling. The province is located in one of the areas with the highest seismic activity in the Iberian Peninsula and has gone through numerous earthquakes and sequences of small movements over the last few decades.

Contemporary Granada also has its own seismic history. Since 1979, the National Geographic Institute has documented earthquakes in the Vega, the Tropical Coast, the Baza basin, and the regions of Alhama and the Temple.

This list does not order the movements solely by their magnitude. It also takes into account their intensity, duration, location, social perception, and relevance to understand the earthquakes that are now affecting the metropolitan area again.

The seismic series of Fuente Vaqueros in 1979

The series of 1979 constitutes the first major seismic episode experienced by democratic Granada and one of the main precedents of the current situation.

The IGN catalog records numerous movements during those months distributed throughout the Vega and its surroundings. On June 20, a magnitude 4.5 earthquake occurred northwest of Beas de Granada. On July 30, the west of Alhendín shook with a magnitude of 3.7 and, just one day later, another of 3.9 was recorded north of Gójar.

The names of Alhendín and Gójar already appeared, therefore, in the Granada sequence 47 years ago. The seismologist José Morales has pointed out that the episode of 2026 presents similarities with that of 1979, although it is still early to determine if Granada is going through a new seismic swarm with comparable characteristics.

The Albuñol earthquake of 1980

On May 30, 1980, an earthquake of magnitude 4.0 shook the northeast of Albuñol, in the Tropical Coast. The IGN assigns it a maximum intensity of IV.

The movement showed that Granada's seismic activity is not limited to the Vega. The coastline and areas close to the Alboran Sea are part of a territory conditioned by the interaction between the Eurasian and African plates.

3. Lentegí, 1984: the largest surface earthquake in decades

The Lentegí earthquake of June 24, 1984 reached a magnitude of 5.0 and occurred at a depth of about five kilometers. Its maximum intensity was V.

It is one of the major recent instrumental earthquakes highlighted by the National Geographic Institute. For decades it was the largest surface earthquake recorded in the province since the arrival of democracy.

The difference between depth and magnitude is essential. A moderate and shallow earthquake can be felt more strongly and cause greater local effects than another numerically superior one originating hundreds of kilometers underground.

The Atarfe earthquake of 1986

On April 26, 1986, an earthquake of magnitude 4.0 was recorded west of Atarfe, at a depth of five kilometers and with a maximum intensity of V.

Its epicenter anticipated one of the points that would feature in the great seismic series of 2020 and 2021. Atarfe, Santa Fe, and Pinos Puente are located in an area crossed by active faults capable of generating numerous surface movements.

Agrón trembles again in 1988

On December 5, 1988, an earthquake of magnitude 4.0 and an approximate depth of seven kilometers was located southwest of Agrón. The movement reached a maximum intensity of V.

Agrón and its surroundings would reappear years later in the catalog of significant earthquakes in Granada. The area is located south of the Vega, near other municipalities with recurrent activity such as Ventas de Huelma, Cacín, and Santa Cruz del Comercio.

Santa Fe, 1996: an earthquake at a kilometer depth

On December 28, 1996, Santa Fe suffered an earthquake of magnitude 4.1. Its depth was just one kilometer and reached intensity V.

The shallow depth favored that the movement was clearly perceived. This episode is another direct precedent of the series that, almost 25 years later, would concentrate thousands of earthquakes between Santa Fe, Atarfe, Pinos Puente, and Cúllar Vega.

The Agrón earthquake of 1997

On February 24, 1997, an earthquake of magnitude 4.3 was recorded southwest of Agrón at a depth of six kilometers. The IGN attributes a maximum intensity of V to it.

It was one of the largest shallow earthquakes that occurred in Granada during the nineties. It also surpassed the movement located nine years earlier in the same area.

Nigüelas, 2010: the largest by magnitude, but at 623 kilometers

The earthquake recorded south of Nigüelas on April 11, 2010, occupies a unique place in this list. The IGN catalog assigns it a magnitude of 6.2 and a depth of 623 kilometers, while the seismotectonic documentation of the agency itself places it at a magnitude of 6.3.

It is the earthquake of greatest magnitude with an epicenter in Granada since the arrival of democracy. However, its extraordinary depth meant that its surface effects were much lower than those one would intuitively associate with a magnitude greater than 6.

The IGN explains that under Granada, earthquakes occasionally occur at more than 600 kilometers deep. In that same area, the Dúrcal earthquake, with a magnitude of 7.8, originated in 1954, although it also did not have the destructive capacity of an equivalent surface movement.

The swarm of Atarfe and Santa Fe in 2020 and 2021

Between December 2020 and August 2021, the Vega de Granada experienced its great contemporary seismic crisis. The IGN recorded more than 3,000 earthquakes.

Five consecutive movements reached magnitudes between 4.1 and 4.4. On January 23, 2021, one of 4.4 was recorded northwest of Santa Fe. Three days later, earthquakes of magnitudes 4.2, 4.4, and 4.1 occurred. On January 28, another of 4.4 took place.

Seven months later, the series produced a new earthquake of magnitude 4.5. The tremors were widely felt by the population and reached maximum intensities V and V-VI. Thousands of neighbors left their homes during the nights of greatest activity.

Alhendín and Gójar, 2026: two earthquakes of magnitude 4.8

The sequence that began in August 2026 closes, for now, this story.

The first major earthquake occurred at 23:04 UTC on August 14, at 1:04 in the early morning of the 15th in mainland Spain. It reached a moment magnitude of 4.8, had its epicenter northeast of Alhendín, and was very shallow.

The earthquake was felt in more than 500 localities in Andalusia, Murcia, Castilla-La Mancha, and Madrid. The IGN received more than 12,000 citizen questionnaires and documented non-structural damage and falling objects.

On August 18, Granada shook again with another earthquake of magnitude 4.8 and epicenter northwest of Gójar. Several significant movements were recorded afterward, including earthquakes of magnitudes 3.9, 4.2, and 4.0.

The episode left minor injuries, hundreds of calls to 112, preventive evacuations, and inspections of homes, public buildings, and monuments. The two movements in Alhendín and Gójar are the largest surface earthquakes recorded in Granada since the Lentegí one in 1984.

Why Granada concentrates so many earthquakes

The Granada basin is one of the areas with the highest seismic activity in the Iberian Peninsula. It is crossed by active fault systems and subjected to the effects of the convergence between the African and Eurasian plates.

The majority of earthquakes are of low magnitude and are never felt. Surface episodes close to populated centers can be felt with intensity even when their magnitude is moderate.

The historical comparison also does not allow predicting how long the sequence of 2026 will last nor if a larger earthquake will occur. It allows confirming another reality: from the Fuente Vaqueros series of 1979 to the earthquakes of Alhendín and Gójar, seismic activity has recurrently accompanied several generations of Granadinos.

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What emergency procedures and action plans exist in Andalusia for earthquakes of similar magnitude to the recent ones in Granada?

In the face of earthquakes like those recently recorded in the province of Granada, Andalusia relies on a network of existing civil protection plans and procedures: a state seismic plan, regional planning (Territorial Civil Protection Emergency Plan of Andalusia and Emergency Plan for Seismic Risk), municipal plans, and the operational protocols of 112 and the Andalusian Emergency Agency (EMA 1‑1‑2).

State and regional framework

At the state level, the State Civil Protection Plan for Seismic Risk, approved by the Council of Ministers Agreement of March 26, 2010, and published by Resolution of March 29, 2010 (BOE-A-2010-5661), establishes the organization and procedures for the deployment of State resources when the earthquake reaches national interest or when autonomous communities require support.

At the Andalusian level, specific planning rests on three main components:

  • The Territorial Civil Protection Emergency Plan of Andalusia (PTEAnd), approved by Decree 69/2024, of March 4, and corrected by the Resolution published in the BOJA of April 9, 2024 (BOJA link). It establishes the general structure for the direction and coordination of emergencies of any kind in the community.
  • The Andalusian Emergency Plan for Seismic Risk, which specifically develops how to act in case of earthquakes: chain of command, operational situations, available resources, and support mechanisms for municipalities. Recent press recalls that this plan aligns with the basic state directive and is activated in different phases depending on severity (article in Demócrata).
  • The State Plan and other special plans (tsunamis, floods, fires, etc.), which coordinate with Andalusian plans in case of combined effects or the need for state resources.

Phases and “operational situations”

Both the PTEAnd and the Emergency Plan for Seismic Risk use activation levels or operational situations. In the Granada episode, the Junta maintained the seismic plan in emergency phase, operational situation 1:

  • Situation 0 (pre-emergency) is used when there is a probable risk or mild seismic activity is recorded, and monitoring and information are reinforced without deploying the full emergency structure.
  • Situation 1 (emergency) is declared, as explained by the Junta itself and reported by the Andalusian press, when a phenomenon has already occurred that requires relief and protection measures for people or property. It implies that the emergency can be controlled with the ordinary and extraordinary means available in Andalusia, without the State assuming direction (detail of situation 1).
  • Situation 2 (analogous to other Andalusian special plans) is reserved for scenarios where additional means from other administrations are necessary, including possible intervention by the Military Emergency Unit.

Role of the Junta, municipalities, and 112

In earthquakes like the magnitude 5 recorded in Alhendín, the Junta de Andalucía assumes the direction of the regional emergency through the Emergency Plan for Seismic Risk, coordinates the 112 service, health services, firefighters, security forces, and resources from various administrations, and can order evacuations or confinements when necessary (competence analysis).

The municipalities activate their Local Territorial Emergency Plans (PTEL) and are responsible for:

  • Mobilizing Local Police, firefighters, and municipal Civil Protection.
  • Cordon off streets and areas at risk of collapse.
  • Inspecting buildings and ordering evacuations when there is immediate risk.
  • Setting up shelters or reception spaces if necessary.

The 112 Andalusia and the Andalusian Emergency Agency (EMA 1‑1‑2) act as coordination centers: they receive calls, classify incidents (cracks, falling cornices, people trapped in elevators, etc.), and mobilize competent services. In the magnitude 3.6 earthquake with epicenter in Armilla on July 26, 2026, they managed 44 calls without personal injuries (official note).

Prevention and self-protection measures

After the seismic series in the Vega de Granada, the Emergency Coordination Center (Cecem 112 Andalusia) developed educational guides with basic recommendations in case of earthquake, for adults and children, available on the Junta’s website (earthquake guide). These guides are integrated into the training and awareness policy on seismic risk and include guidelines before, during, and after the earthquake.

In summary, faced with earthquakes like those in Granada, Andalusia does not improvise: it applies a scheme already defined in the State Seismic Plan, the PTEAnd, the Emergency Plan for Seismic Risk, and municipal plans, activating the corresponding phase (in these cases, emergency, operational situation 1), centralizing management in 112, and articulating both the immediate response and technical reviews and information to the population.

What are the competencies of the National Geographic Institute in monitoring and analyzing seismic activity in Spain?

The National Geographic Institute (IGN), dependent on the Ministry of Transport and Sustainable Mobility, is the reference body in Spain for monitoring, surveillance, and analysis of seismic activity. Its competencies cover both real-time data acquisition and its interpretation and provision to civil protection authorities and the public.

Permanent seismic monitoring and National Seismic Network

The core function of the IGN in this area is the continuous seismic monitoring of Spanish territory through the National Seismic Network. This network, managed and maintained by the IGN, consists of dozens of seismic stations distributed across the Peninsula, Balearic Islands, Canary Islands, and nearby marine areas. According to various official documents and recent news, the IGN:

  • Records all detectable seismic movements by the network, including many not perceived by the population. In episodes like the Granada seismic series, “hundreds of earthquakes” localized and reviewed by the agency are mentioned.
  • Controls and maintains the seismic network and associated geodetic networks, according to resolutions published in the Official State Gazette, which explicitly mention the “control and maintenance of the seismic network and geodetic and leveling networks.”
  • Densifies and reinforces instrumentation in active zones: in Granada, for example, in addition to permanent stations, portable seismic stations have been deployed to improve the location and characterization of events.

Detection, location, and earthquake parameters

Regarding responsibility distribution in an earthquake, the consulted documentation indicates that the State, through the IGN, assumes the task of “seismic monitoring, national coordination, and extraordinary support.” More specifically, the IGN is the body responsible for detection, location, and calculation of seismic parameters:

  • Determines the origin time of the earthquake.
  • Calculates the epicenter (geographical coordinates) and depth.
  • Estimates the magnitude and subsequently revises that value as it processes all recorded signals.
  • Evaluates the macroseismic intensity (effects on people and buildings) based on instrumental data and questionnaires filled out by the population.

These tasks are reflected in the official seismic catalog, which the IGN updates as it reviews data. Recent news about Granada emphasize that the National Seismic Network “confirms the succession of small earthquakes” and modifies, if appropriate, magnitude or parameters of events.

Analysis, risk assessment, and emergency management support

Based on collected data, the IGN exercises scientific-technical analysis competencies of seismic activity:

  • Analyzes the evolution of seismic sequences (for example, in Granada or Cádiz–Málaga), identifying whether it is an isolated earthquake, a series of aftershocks, or a prolonged “swarm.”
  • Contributes to the assessment of seismic hazard, preparing seismicity and hazard maps showing the highest risk areas (southern and southeastern peninsula, Alboran Sea, Gulf of Cádiz, Pyrenees, Canary Islands, etc.).
  • Cooperates with other specialized bodies – such as the Geological and Mining Institute of Spain or regional geophysical institutes – to analyze the origin of sequences, associated threats, and implications for the population.

Although the IGN does not direct the emergency (this responsibility lies with regional civil protection and, if applicable, the Ministry of the Interior when the emergency is of national interest), its technical information is a key input for decision-making: it allows deciding whether to activate or maintain special seismic risk plans, order preventive evacuations, or inspect potentially damaged infrastructure.

Alerts, tsunamis, and other geophysical phenomena

The IGN’s competencies also extend to associated phenomena:

  • The National Seismic Network, dependent on the IGN, is part of the National Tsunami Warning System, being the body responsible for detecting, assessing, and initially informing about phenomena that may generate tsunamis, according to a 2025 resolution published in the BOE.
  • The IGN coordinates the monitoring of volcanic activity and other geophysical phenomena (geomagnetism, slope instability, etc.), integrating seismic information into volcanic risk assessment (cases of Teide or La Palma).
  • It has developed the National Plan for Seismic, Volcanological, and Other Geophysical Phenomena Monitoring (2025-2028), which sets measures to strengthen monitoring networks, improve detection, and optimize communication and alert systems.

Public information and consultation tools

Finally, the IGN has the competence to disseminate official seismic information to the public:

  • Maintains services such as “IGN Earthquakes” and the online map viewer, where anyone can consult almost real-time the latest earthquakes and their locations.
  • Collects information through macroseismic questionnaires in which the population describes what they felt, contributing to intensity assessment.
  • Publishes technical notes and participates in outreach and training actions, reinforcing prevention and seismic culture.

Overall, the IGN assumes in Spain the function of “knowing where it shakes and with what intensity”: it monitors, measures, analyzes, and makes its results available to civil protection systems, other administrations, and the public.

What legal requirements must new buildings in Granada meet to guarantee their resistance to earthquakes?

In Granada, as in the rest of Spain, earthquake resistance for newly constructed buildings is mainly guaranteed through state technical regulations, complemented by the Andalusian urban framework and municipal ordinances. According to the information found, there is no “special” Granada-specific regulation that replaces the Technical Building Code (CTE); rather, it is mandatory and complemented by local urban planning.

1. Mandatory state framework

The basic pillar is the Technical Building Code, approved by Royal Decree 314/2006, of March 17, and successively amended (for example by Royal Decree 732/2019 and Royal Decree 450/2022). Regarding seismic matters, it mainly affects:

  • DB-SE Structural Safety: sets the basic requirement for resistance and stability and refers to the Basic Structural Documents (DB-SE-AE, DB-SE-C, etc.).
  • DB-SE-AE Actions on the building: includes seismic action as one of the actions to be considered in calculations.
  • DB-SE-C Foundations: regulates the design and sizing of foundations, fundamental in seismic zones and conditioned by the geotechnical study.

Linked to the CTE is the Seismic Resistant Construction Standard: general part and building (NCSE-02), approved by Royal Decree 997/2002. This standard:

  • Applies to all building projects and works in Spain, except sectors with specific standards (bridges, dams, etc.).
  • Defines the seismic design actions based on the hazard of the area (Granada is among the highest seismicity areas in the peninsula) and soil type.
  • Establishes seismic coefficients, building importance categories (e.g., ordinary residential use versus essential buildings), and design criteria to limit damage.

In practice, any new building in Granada must have a structural project that certifies joint compliance with the CTE and NCSE-02, signed by a competent technician and subject to quality controls established by these standards (geotechnical study, material reception control, execution control, and, if applicable, load tests or special verifications).

2. Andalusian regional regulations

At the regional level, there is no regulation redefining seismic parameters for Granada; rather:

  • The Law 7/2021, of December 1, on promoting the sustainability of Andalusian territory (BOE-A-2021-20916) and its urban development frame the use of land, building intensities, and safety conditions but refer to state technical regulations.
  • The Order of July 21, 2008, on technical design and quality standards for protected housing in Andalusia (BOJA 154/2008), updates design requirements for protected housing and expressly recognizes that the CTE is the general reference for technical building conditions, including structural ones.

Therefore, in Andalusia, seismic requirements are understood to be covered by correctly applying the CTE and NCSE-02; the Autonomous Community adds design, habitability, and procedural conditions in areas such as protected housing but does not replace the basic state seismic-resistant regulations.

3. Granada municipal planning and ordinances

The general plans and municipal ordinances of Granada (PGOU and building ordinance) may impose additional conditions on heights, structural typologies, setbacks, plot occupancy, foundation conditions in certain areas, or technical documentation to be submitted, but within the minimum framework of the CTE and NCSE-02.

No specific “seismic resistance” ordinance for Granada modifying state seismic coefficients has been identified in the official sources consulted. In practice:

  • The City Council may require more detailed geotechnical studies in areas with problematic soils or fills.
  • It may condition maximum height, basement floor configuration, or containment systems, which indirectly affect seismic behavior.
  • In certain actions (e.g., special plans in historic areas), it may set structural intervention criteria compatible with seismic resistance and heritage protection.

4. Key technical requirements in a seismic zone like Granada

Integrating applicable state regulations, for a new building in Granada, the following aspects are essential, among others:

  • Building classification according to its importance (ordinary residential, essential building, etc.), which conditions safety requirements and allowable damage levels.
  • Determination of seismic action: selection of design spectrum according to Granada’s seismic zone and soil type based on NCSE-02 maps and formulas.
  • Regular structural design (in plan and elevation), avoiding severe irregularities that concentrate stresses, with construction details ensuring ductility (joints, reinforcements, anchors).
  • Foundation adapted to the soil, based on geotechnical study, following DB-SE-C criteria to limit differential settlements and combined effects of earthquake and other actions.
  • Treatment of non-structural elements (facades, partitions, false ceilings, suspended installations) so they do not detach or compromise evacuation during a quake.
  • Quality and execution control, with material tests and construction checks verifying that what is built matches the project calculated with seismic action.

In summary, to guarantee earthquake resistance in Granada, strict compliance with the CTE (especially the Basic Structural Documents) and NCSE-02 is required, within the Andalusian urban framework and local ordinances, which may add formal or design requirements but do not reduce state seismic requirements.

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