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This chapter explores the theory of plate tectonics, which reveals Earth as a dynamic planet whose surface is continually reshaped by slow but powerful forces. Beginning with the formation of the Earth and its layered internal structure, the chapter explains how heat from radioactive decay and Earth’s early history drives motion within the mantle. It traces the development of the idea of continental drift, from early observations of matching coastlines and fossils to Alfred Wegener’s proposal of a once-unified supercontinent and the eventual acceptance of plate tectonics in the mid-twentieth century. The chapter describes how Earth’s lithosphere is divided into tectonic plates that move atop the softer asthenosphere, interacting at boundaries where they collide, separate, or slide past one another. These interactions account for major geological phenomena including mountain building, earthquakes, volcanoes, seafloor spreading, and island formation. Examples such as the Ring of Fire, the Himalayas, and volcanic hot spots illustrate how plate motion shapes the planet’s surface over millions of years. The chapter concludes by emphasizing the long-term unpredictability of tectonic evolution, highlighting plate tectonics as a striking example of deep-time dynamics governed by simple physical principles.
To examine the frequency, distribution, and human impact (specifically fatalities and injuries) of geophysical and hydrological hazard-related disasters in Europe from 2000 to 2025.
Methods
We conducted a retrospective analysis of Emergency Events Database (EM-DAT, CRED/UCLouvain, Brussels, Belgium) records. Included events were earthquakes, volcanic activity, dry mass movements, floods, wet mass movements, and wave action. Deaths and injuries were summarized descriptively and compared using appropriate statistical tests.
Results
A total of 566 events were identified, of which 510 (90.1%) were hydrological and 56 (9.9%) geophysical. Floods were the most frequent events (n = 492), while earthquakes ranked second overall (n = 52). Southern Europe recorded the highest number of deaths, whereas Eastern Europe had the highest number of injuries. Overall, the examined events caused 3,547 deaths and 14,470 injuries. Median deaths did not differ significantly between groups (P = 0.791), while median injuries were higher in geophysical events (P = 0.036).
Conclusions
In Europe, hydrological hazard-related emergency events were more common than geophysical hazard-related emergency events. However, most fatalities and injuries resulted from a few severe floods and earthquakes with distinct geographic patterns. Because event frequency does not directly reflect harm to humans, these findings further highlight the importance of an all-hazard approach to emergency planning; disaster preparedness should align resilience strategies with regional hazard profiles, population vulnerability, and health-system capacity.
To compare dermatologic outpatient diagnostic frequencies before and after the February 6, 2023 Hatay earthquake and to evaluate the implications of these temporal changes for disaster-responsive dermatologic care.
Methods
This retrospective study compared tertiary-center dermatology outpatient diagnosis records from the pre-earthquake (February 6, 2021-February 3, 2023) and post-earthquake (May 11, 2023-February 6, 2025) periods. Diagnoses were classified into 18 categories and 69 ICD-10-coded subdiagnoses. Logistic regression adjusted for age, sex, and calendar month using patient-clustered robust standard errors; aORs with 95% CIs and FDR-adjusted q values were reported.
Results
Among 41,012 diagnosis records, 19,646 were from the pre-earthquake period and 21,366 from the post-earthquake period. After adjustment, infestations/insect bites were more frequently represented in the post-earthquake diagnostic mix (aOR 2.55, q < 0.001). Dermatitis (aOR 1.17, q < 0.001), bacterial diseases (aOR 1.58, q < 0.001), environmentally induced diseases (aOR 1.51, q = 0.003), and sexually transmitted diseases (aOR 1.50, q < 0.001) were also more frequently represented. Acneiform disorders were less frequently represented (aOR 0.61, q < 0.001). Despite a crude increase, fungal infections did not differ significantly in the adjusted analysis (aOR 1.04, q = 0.149).
Conclusions
Post-earthquake records showed more infestations and selected infectious and environmentally related diagnoses, but lower representation of some chronic disorders. These clinic-based associations support dermatologic surveillance, infection control, and continuity of care in disaster planning without implying population-level prevalence changes or causal earthquake effects.
On 6 February 2023, sequential Mw 7.7 and 7.6 earthquakes devastated 11 provinces in Türkiye. Two years on, the Emergency Medicine Association of Türkiye (EMAT) assessed recovery from an emergency department (ED) perspective.
Methods
We conducted a cross-sectional survey of emergency physicians and residents in the most affected provinces (Kahramanmaraş, Adıyaman, Malatya).
Results
Respondents were predominantly male (81.1%) and residents (70.3%). Family routines had partly stabilized (48.6%), yet ongoing household mental-health problems were common (54.1%). Housing remained strained: most homes were slightly damaged (59.5%); 13.5% of physicians continued to live in temporary shelters. Concerns persisted about hospital structural safety (59.4%). Equipment issues centered on delayed maintenance/repair (64.9%). ED operations suffered from crowding (70.3%), workload related to staffing gaps (67.6%), and inadequate physical space (56.8%). Academic activity was disrupted (51.4%), with perceived declines in educational standards versus non-affected provinces (40.5%).
Conclusions
Two years post-earthquake, substantial deficits persist across infrastructure, workforce, equipment maintenance, psychosocial well-being, and training. EMAT recommends coordinated actions on structural safety, supply chains, psychosocial support, durable housing, academic workforce recovery, governance/coordination, targeted financial incentives, and continuous monitoring to restore resilient, high-quality emergency care in the region.
This study aimed to examine breastfeeding continuity and the factors influencing breastfeeding among women whose breastfeeding period overlapped with the earthquakes centered in Kahramanmaraş, Türkiye, on February 6, 2023.
Methods
This descriptive study was conducted in tent and container settlements established in earthquake-affected areas. The sample included 217 women who were breastfeeding at the time of the disaster. Data were collected using a structured form addressing sociodemographic, obstetric, and breastfeeding-related variables. Descriptive statistics (frequency, percentage, mean, and standard deviation) were applied in accordance with the STROBE guidelines.
Results
The mean age of participants was 28.45 ± 5.45 years; most were unemployed (95.4%) and reported that their income was lower than their expenses (78.8%). Before the earthquake, 59.0% of the women exclusively breastfed, whereas this rate decreased to 30.9% after the disaster. The most common facilitators were mothers’ motivation to keep their infants alive (29.5%) and access to transportation (20.3%). The primary barriers were unmet basic needs (30.4%), lack of privacy (22.6%), and psychological distress (21.7%). Overall, 67.3% of the women emphasized that meeting basic needs was essential for continuing breastfeeding, while only 17.5% reported receiving breastfeeding counseling.
Conclusions
This study revealed significant barriers to health care access among breastfeeding women following a major disaster. The findings highlight the necessity of incorporating breastfeeding women into disaster preparedness and response plans. Disaster interventions should prioritize safe environments, psychosocial support, and professional counseling to ensure breastfeeding continuity. Protecting breastfeeding must be recognized as a strategic public health priority within disaster preparedness and response.
Between 2010 and 2012, a catastrophic earthquake sequence devastated Christchurch, a colonial city built on Ngāi Tahu ancestral land in Canterbury, New Zealand. This chapter explores how government agencies, including public health services, collaborated with mana whenua (Ngāi Tahu, the local Māori tribe) to rebuild Ōtautahi Christchurch in ways that respect its colonial past while looking to a climate-challenged future. The rebuild sought to integrate natural environmental features and symbolic markers significant to mana whenua, while also promoting health, wellbeing, and a renewed sense of place for all residents. Writing as three Tangata Tiriti (settler-colonial) women, we draw on our professional roles in public health, urban design, landscape architecture, and strategic planning. We reflect on our involvement in planning and policy implementation, considering what worked well, what fell short, and our hopes for a future city that fosters resilience, inclusivity, and belonging.
This study examined the relationship between food safety, food access, and nutritional status among earthquake victims in Kahramanmaraş and Hatay, Türkiye.
Methods
This descriptive, cross-sectional study was conducted face-to-face with 209 earthquake victims in 2023.
Results
The median age was 42 years, and 52.6% were female. Among women, the perception of unhealthy food, inadequate mass feeding services, and dissatisfaction with meals increased the risk of food safety concerns. In men, those with an associate degree or higher were 20.7 times more likely to perceive food safety as inadequate, while the perception of unhealthy food raised this risk by 12.4 times. Lack of access to sufficient drinking water increased the risk of food inaccessibility by 2.6 times among women. In men, employment and dissatisfaction with meals increased this risk by 2.7 and 2.8 times, respectively. Both genders exhibited inadequate intake of water, energy, protein, polyunsaturated fats, fiber, folate, potassium, calcium, magnesium, iron, zinc, and several vitamins (P <0.05), while phosphorus and sodium levels were elevated (P <0.01).
Conclusions
Food safety and access issues were critical among earthquake victims, significantly impacting nutritional status. Findings emphasize the need for improved emergency food aid and distribution systems to mitigate post-disaster nutritional risks.
This study aims to elucidate the ethical dilemmas faced by pre-hospital emergency medical service personnel during disaster triage, with a specific focus on the Kahramanmaraş Earthquakes, and to document their experiences.
Materials and Methods
This phenomenological study employed semi-structured interviews with 29 pre-hospital emergency medical service workers who served during the first 72 hours of the Kahramanmaraş Earthquakes to gather qualitative data. Purposeful sampling was used for face-to-face interviews, and MAXQDA20 was utilized for content analysis.
Results
The main themes encompassed problems related to disaster management organization, environmental factors, and individual factors. Environmental factors, such as coordination deficiencies at the scene, jurisdictional confusion, security concerns, and seasonal conditions, as well as personal factors including education and experience, were pivotal in the occurrence of ethical dilemmas in disaster triage.
Conclusion
Pre-hospital emergency medical services personnel affected by the disaster faced more ethical dilemmas. The presence of many affected children had a profound emotional impact on participants, leading to more frequent ethical dilemmas, particularly in the application of black code protocols.
With its focus on the city rather than the disaster event, this book situates natural disasters in the context of urban growth and change. It offers an original, interdisciplinary perspective by connecting the technical and socioeconomic dimensions of disaster risk and highlighting the commonalities of hazards such as river flooding, coastal flooding, and earthquakes. The book begins by proposing a novel Urban Risk Dynamics framework that emphasizes the roles of economy, landscape, and technology in influencing hazard, exposure, and vulnerability. This framework is then used to support the examination of six contrasting cities from around the world, offering generalized insights that apply to a wide range of urban risk contexts. The book will be of significant interest to students and researchers working in urban planning, civil engineering, Earth sciences, and environmental science, and to policy makers and practitioners concerned with reducing future disaster risk in cities.
Mountains are among the most prominent and inspiring landforms on Earth. Earth’s internal (tectonic, or endogenic) and external (surface, or exogenic) processes have conspired to produce a wealth of mountainous landscapes that span almost every region of our planet. No strict definition of a mountain exists, other than they rise abruptly and prominently above the surrounding land, usually in the form of peaks and ridges. Thus, mountains have considerable local relief. Some mountains may rise only a few hundred meters above sea level (asl), such as the highest mountain in the United Kingdom, Ben Nevis (1,099 m asl [above sea level]). Nonetheless, it is one of the most formidable mountains in the Scottish Highlands (Fig. 6.1A). Other mountains are far more prominent. Mount Everest, the highest point on Earth at 8,849 m asl (Fig. 6.1B), is undoubtedly the most famous of all mountains.
Chapter 1 focuses on the wide disparity in overall social and economic conditions and ecological disturbances that hindered Izmir’s promising economic prospects and retarded its integration with the countryside before the mid-nineteenth century. In this chapter, I discuss a series of natural and human-made disasters and catastrophes, such as earthquakes, fires, epidemics, and problems and obstacles, and how Western Anatolia’s urban and rural residents coped with them.
This chapter continues the story of Sofia’s water supply, beginning with the political turmoil that marred urban fabrics and economies across the Ottoman Balkans from the 1790s to the 1820s and ending in 1912 when, after a long series of failed attempts, post-Ottoman Sofia received its first modern water supply system. I emphasize the similarity in the predicaments that shaped the Ottoman and Bulgarian policies in the fields of urban planning, underground infrastructures, and natural resource management. I explain how a series of extreme human-made and natural phenomena, including banditry, war, and intensified seismicity limited the capabilities of the Ottoman authorities to accomplish their modernizing intentions. In post-Ottoman Bulgaria, the modernization of urban fabrics was seen as a statement of the superiority of the nation-state over its former imperial master. However, in a series of attempts to meet the water needs of the national capital’s constantly expanding population, the post-Ottoman authorities found themselves continually unable to come up with solutions superior to the water supply practices of their predecessors. The chapter argues that throughout the long nineteenth century Sofia’s water supply functioned within the bounds of the system established by the Ottomans.
David T. Sandwell, Scripps Institution of Oceanography, University of California, San Diego,Xiaohua Xu, University of Science and Technology of China,Jingyi Chen, University of Texas at Austin,Robert J. Mellors, Scripps Institution of Oceanography, University of California, San Diego,Meng Wei, University of Rhode Island,Xiaopeng Tong, Institute of Geophysics, China Earthquake Administration,John B. DeSanto, University of Washington,Qi Ou, University of Edinburgh
Chapter 1 discusses six types of remote sensing methods possible from Earth’s orbit and introduces radar interferometry as the optimal approach for measuring small surface deformation.
Following natural disasters nurses assume a critical role in the provision of primary health care services in container cities. This study aims to reveal the experiences of nurses who voluntarily provided primary health care services in the container city constructed after the earthquake.
Methods
This study was conducted using a qualitative study design, and reported following the COREQ guidelines. Interviews were conducted with 9 volunteer nurses between January 11-29, 2024. Study data were collected using a “Personal Information Form” and “Semi-Structured Questionnaire” via in-depth interview technique. Collected data were analyzed with a 6-step thematic analysis method.
Results
Five main themes were featured in the study: “Factors affecting participation in volunteer activities,” “Scope of volunteer services,” “Challenges experienced in volunteer activities,” “Achievements of volunteer activities,” and “Suggestions for improving volunteer services.”
Conclusions
Volunteer nurses have experienced various gains, as well as difficulties, as a result of their container city experiences. Suggestions for improving disaster nursing are instructive in terms of strengthening disaster nursing.
The study addresses nutrition service management after the 7.8M and 7.6M Kahramanmaraş earthquakes. Initially, permission from the Turkish Red Crescent General Directorate and the support of the Turkish Red Crescent Academy were obtained to gather knowledge about the disaster response. In the short term, nutritional support was achieved for some settlements by the Turkish Red Crescent because the affected area was on a large scale. As a result, risk management should be considered, especially when planning nutrition services for the acute period. Nevertheless, the Turkish Red Crescent coordinated the long-term transportation and management of all food aid. Nearly 100 000 earthquake victims received nutrition services from the Turkish Red Crescent, while more than 3 million earthquake victims received food aid from nutrition platforms and other institutions. A multilevel nutrition service management model, which includes pre-disaster, disaster, and post-disaster, can accelerate the transition to normalization following the earthquake with a high-quality food supply and nutrition service.
Comprising the largest group of health care professionals, nurses play a great role and assume many responsibilities during disaster periods, when the public needs health care services the most. The aim of this study was to reveal the experiences of nurses assigned to the disaster area during relief efforts after the February 6, 2023 earthquakes in Türkiye.
Methods
This qualitative and descriptive study used the maximum variation sampling method, one of the purposive sampling methods, and was completed with 20 nurses. Data were analyzed using inductive content analysis.
Results
Four main themes emerged from the experiences of the nurses who provided health care services in the disaster area: experiences related to pre-mission processes, experiences during the mission, post-mission experiences, and recommendations for disaster preparedness.
Conclusions
Nurses’ experiences and suggestions revealed in this study may inform future disaster preparedness and disaster management plans, and this study’s results point to the need for the development of professional nursing skills in disaster management.
Disaster risk reduction measures are now being developed based on social vulnerability. This study aimed to identify socially vulnerable areas to disasters in Razavi Khorasan Province, Iran.
Methods
The research utilized a mixed method approach conducted in 2 stages. First, a vulnerability index was created using 8 sub-indices, and the value of the index was calculated for each of the 91 rural districts in the study area. In the second stage, spatial analysis using Anselin’s Local Moran’s I was performed to identify the most vulnerable districts.
Results
Results indicated that 40 of 91 districts, covering 49% of the total area, had high social vulnerability to disasters. Anselin’s Local Moran’s I analysis identified 2 high-high clusters consisting of 5 districts. The study also found that areas with higher social vulnerability were more susceptible to natural hazards such as floods and earthquakes.
Conclusions
Nearly half of the studied areas exhibited a high level of social vulnerability and were at risk of natural disasters. Implementing general measures to improve the socio-economic status of the population, such as increasing education and income levels, along with specific actions like assisting vulnerable populations in relocating to safer areas, can help mitigate disaster risks.
This article explores 2 key earthquake survival strategies: the widely endorsed “Drop, Cover, and Hold On” (DCH) method and the alternative fetal position within a survival triangle. While DCH provides mechanical protection from falling debris, its effectiveness in scenarios involving structural collapse and prolonged entrapment remains uncertain. Drawing on recent field data and thermodynamic considerations, this paper argues that the fetal position may offer survival advantages by minimizing heat loss and conserving metabolic energy—especially under cold conditions and delayed rescue. We emphasize the need for context-sensitive public safety guidance and further comparative research to inform adaptive earthquake preparedness protocols.
Ozette Lake, located on the Olympic Peninsula of western Washington, is ideally situated to provide a sedimentary record of past earthquakes along the northern portion of the Cascadia subduction zone. The lake stratigraphy is punctuated by turbidites, with characteristics typical of those triggered by earthquake shaking as seen in other lakes worldwide. Sediments deposited in Ozette Lake over the past 1300 years between earthquake events show decadal-scale variations in color, magnetic susceptibility, clay content, organic carbon content, density, and computed tomography (CT) intensity. Applying the dynamic time warping technique reveals a strong correlation of CT intensity to historical, instrumental measurements of regional cool-season precipitation, indicating that sediments in the lake preserve a high-fidelity record of decadally averaged fluvial sediment discharge and climate. Correlation of CT intensity patterns from older strata preserved deeper in the lake stratigraphy to two independent, regional paleo-precipitation reconstructions similarly suggests that the sediments record decadal variations in hydroclimate. We provide radiocarbon-independent dates for the past four northern Cascadia subduction earthquakes that are within the uncertainty of a radiocarbon age-depth model but are more precisely estimated by placing earthquake-triggered turbidites in the context of wet and dry periods in these tree-ring- and oxygen-isotope-based reconstructions. Paleoclimate-based constraints on the age of event layers in this and other regional lakes have the potential to help address ongoing questions about past ruptures on the Cascadia subduction margin.