M. A. Baptista

M. A. Baptista
Instituto Politécnico de Lisboa | ISEL

PhD

About

158
Publications
43,284
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2,873
Citations

Publications

Publications (158)
Conference Paper
In this work, we present a 2DV study of the interaction of a tsunami wave with the Cascais marina breakwater. The numerical modelling is performed with the open-source computational fluid dynamics software OpenFOAM and the olaFlow toolbox. The tsunami wave, which resembles a leading depression N-wave, enters the domain from Southwest with a wave h...
Article
Full-text available
Volcanoes can produce tsunamis through earthquakes, caldera and flank collapses, pyroclastic flows, or underwater explosions1,2,3,4. These mechanisms rarely displace enough water to trigger transoceanic tsunamis. Violent volcanic explosions, however, can cause global tsunamis1,5 by triggering acoustic-gravity waves6,7,8 that excite the atmosphere-o...
Article
Mass-wasting events are a key process in the evolution of volcanic ocean islands. They occur at various dimensional scales and present a major source of hazard. When the collapsed material plunges into the sea, destructive tsunamis can be generated. Yet, the hazard potential of collapse-induced tsunamis is still poorly understood with different opi...
Article
Full-text available
Recently, the North American and Japanese authorities began combining the tsunami forces with other loads in their structural design guidelines. Nonetheless, due to the infrequent nature of tsunamis, the provisions may benefit from complementary insights on the qualitative and quantitative characterization of the extreme phenomena and their interac...
Conference Paper
Ports are strategic socioeconomical structures that may be affected by catastrophic natural hazards, like earthquakes and their subsequent tsunamis. To mitigate the effects of cascading earthquake and tsunami hazards on ports, it is necessary to design performance-efficient portuary structures against the succession of earthquake and tsunami action...
Article
Full-text available
The Eurasia–Nubia plate boundary between the Azores and the Strait of Gibraltar has been the place of large tsunamigenic earthquakes. The tectonic regime is extensional in the Azores, transcurrent along the Gloria Fault, and compressional in the Strait of Gibraltar. Here, the plate boundary is not clearly defined. The knowledge of past events that...
Conference Paper
When no field data is available or a conceptual analysis is envisaged, it is a common approach to model tsunamis as solitary waves (SW), both in experimental and numerical studies. However, it has been suggested that N-shaped waves are more adequate to describe the main tsunami wave. The usual method for laboratory generation of SW is based on the...
Article
Full-text available
This paper provides a timely review of progress and ongoing research needs in tsunami hazard and risk science since the most recent major event, the Tohoku tsunami in 2011. The tsunami community has made significant progress in understanding tsunami hazard from seismic sources. However, this is only part of the inputs needed to effectively manage t...
Article
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Twenty-two papers on tsunamis are included in the Pure and Applied Geophysics topical issue “Twenty five years of modern tsunami science following the 1992 Nicaragua and Flores Island tsunamis: Volume I,” reporting on the frontiers of tsunami science and research. The first three papers overview significant tsunamis of 1992–2018 and discuss the pro...
Article
The stratigraphy of the Tagus river ebb-tidal delta off Lisbon (Portugal) is investigated using high resolution multichannel seismic reflection profiles with the purpose of searching for sedimentary or erosive features associated with landslides. The Tagus delta is sub-divided in two prograding seismic units of 17 ky to 13 ky and 13 ky to Present b...
Article
Full-text available
The segment of the Africa–Eurasia plate boundary between the Gloria Fault and the Strait of Gibraltar has been the setting of significant tsunamigenic earthquakes. However, their precise location and rupture mechanism remain poorly understood. The investigation of each event contributes to a better understanding of the structure of this diffuse pla...
Article
Full-text available
Numerical modelling is a fundamental tool for scenario-based evaluation of hazardous phenomena such as tsunami. Nevertheless, the numerical prediction highly depends on the tool quality and therefore the design of efficient numerical schemes that provide robust and accurate solutions still receives considerable attention. In this paper, we implemen...
Article
In this research work, a novel theoretical first-order formulation for the generation of N-waves in laboratory, by means of a piston-type wave-maker, is presented. The plate's trajectory, velocity and acceleration equations for the generation of tsunami N-waves in a wave flume are deduced. A set of laboratory experiments performed for the generatio...
Article
Full-text available
Abstract Tsunamis generated along the Makran subduction zone (MSZ) threaten the Sur coast of Oman, according to deterministic and probabilistic analyses presented here. A validated shallow water numerical code simulates the source-to-coast propagation and quantifies the coastal hazard in terms of maximum water level, flow depth, and inundation dist...
Article
Full-text available
The tsunami catalogues of the Atlantic include two transatlantic tsunamis in the 18th century the extensively studied 1st November 1755, and 31st March 1761. The latest event struck Portugal, Spain, and Morocco around noontime. Several sources report a tsunami following the earthquake as far as Cornwall (United Kingdom), Cork (Ireland) and Barbados...
Poster
To study the impact on coastal structures from an earthquake and its induced tsunami, a simultaneous knowledge of the event generation, its propagation, and the structural behaviour, is essential. The performance of structures under seismic ground motions has been investigated through numerical modelling and experiments. More recently, structural a...
Article
Full-text available
Applying probabilistic methods to infrequent but devastating natural events is intrinsically challenging. For tsunami analyses, a suite of geophysical assessments should be in principle evaluated because of the different causes generating tsunamis (earthquakes, landslides, volcanic activity, meteorological events, asteroid impacts) with varying mea...
Article
Full-text available
In this study we present a comprehensive methodology to produce a synthetic tsunami waveform catalogue in the northeast Atlantic, east of the Azores islands. The method uses a synthetic earthquake catalogue compatible with plate kinematic constraints of the area. We use it to assess the tsunami hazard from the transcurrent boundary located between...
Chapter
Tsunamis occur quite frequently following large magnitude earthquakes along the Chilean coast. Most of these earthquakes occur along the Peru–Chile Trench, one of the most seismically active subduction zones of the world. This study aims to understand better the characteristics of the tsunamis triggered along the Peru–Chile Trench. We investigate t...
Conference Paper
Full-text available
The risk mitigation associated with tsunami events needs robust and accurate numerical tools to provide realistic solutions. We propose a comparative study between the efficiency of a finite volume numerical code, with second-order discretization in space and time, equipped with two different techniques to solve the non-conservative shallow-water e...
Presentation
Full-text available
The risk mitigation associated with tsunami events needs robust and accurate numerical tools to provide realistic solutions. We propose a comparative study between the efficiency of a finite volume numerical code, with second-order discretization in space and time, equipped with two different techniques to solve the non-conservative shallow-water e...
Article
Full-text available
In this study we present a comprehensive methodology to produce a synthetic tsunami waveform catalogue in the North East Atlantic, east of the Azores islands. The method uses a synthetic earthquake catalogue compatible with plate kinematic constraints of the area. We use it to assess the tsunami hazard from the transcurrent boundary located between...
Article
Large tsunamis occur infrequently but have the capacity to cause enormous numbers of casualties, damage to the built environment and critical infrastructure, and economic losses. A sound understanding of tsunami hazard is required to underpin management of these risks, and while tsunami hazard assessments are typically conducted at regional or loca...
Article
Full-text available
Contributions of Geographical Sciences to Tsunami Risk Prevention in Morocco By focusing on Morocco, this article shows how the geographical sciences can contribute to improving the knowledge of tsunami risk and its prevention following an integrated and spatial approach based on the concept of scenario. The main results presented here come from t...
Article
Full-text available
ABSTRACTIn this study, we present a methodology to reconstruct a Paleo Digital Elevation Model (PDEM) to simulate the propagation of a tsunami similar to the one that occurred on the 1st November 1755 in Cascais, Portugal. The method combines historical data, GPS-measurements, and present-day topographic data to build the PDEM. Antique maps were ge...
Article
Full-text available
Tsunami is among the most devastating natural hazards phenomenon responsible for significant loss of life and property throughout history. The Sultanate of Oman and United Arab Emirates are among the Indian Ocean countries that were subjected to one confirmed tsunami in November 27, 1945 due to an Mw 8.1 earthquake in Makran Subduction Zone. In thi...
Conference Paper
Full-text available
Moscone South ­ Poster Hall The NE Atlantic (NEA) is prone to tsunami impact of tectonic origin. Previous studies and tsunami catalogs report the occurrence of significant events namely the 1 November 1755 and the 28 February 1969. In the NEA, the most impacted areas are the coastal zone of Portugal, Morocco and the Cadiz Gulf in Spain. In this stu...
Article
Full-text available
This study constitutes a preliminary assessment of probabilistic tsunami inundation in the NE Atlantic region. We developed an event-tree approach to calculate the likelihood of tsunami flood occurrence and exceedance of a specific near-shore wave height for a given exposure time. Only tsunamis of tectonic origin are considered here, taking into ac...
Chapter
This chapter focuses on the first quantitative study of tsunami hazard in the Azores with numerical modeling, used to investigate the biggest failure known there to date. The numerical modeling is used to simulate its mass flow toward and under the sea, and the subsequent tsunami generation and propagation. The results suggest how both the present-...
Article
The Sultanate of Oman is among the Indian Ocean countries that were subjected to at least two confirmed tsunamis during the twentieth and twenty-first centuries: the 1945 tsunami due to an earthquake in the Makran subduction zone in the Sea of Oman (near-regional field tsunami) and the Indian Ocean tsunami in 2004, caused by an earthquake from the...
Article
The Sultanate of Oman is among the Indian Ocean countries that were subjected to at least two confirmed tsunamis during the twentieth and twenty-first centuries: the 1945 tsunami due to an earthquake in the Makran subduction zone in the Sea of Oman (near-regional field tsunami) and the Indian Ocean tsunami in 2004, caused by an earthquake from the...
Article
Full-text available
Tsunami modeling commonly accepts the shallow-water system as governing equations where the major difficulty is the correct treatment of the non-conservative term due to bathymetry variations. The finite volume method for solving the shallow-water equations with such source terms has received great attention in the two last decades. The built-in co...
Article
Full-text available
On 8 May 1939, an earthquake (Ms7.1) occurred near the Azores archipelago, with an epicentre located close to the western end of the Gloria fault. Previous studies present different epicentre locations spreading over a large area, and two different types of focal mechanisms. Given these uncertainties, the interpretation of the seismological informa...
Article
Full-text available
The M∼8.3–8.4 25 November 1941 was one of the largest submarine strike-slip earthquakes ever recorded in the Northeast (NE) Atlantic basin. This event occurred along the Eurasia-Nubia plate boundary between the Azores and the Strait of Gibraltar. After the earthquake, the tide stations in the NE Atlantic recorded a small tsunami with maximum amplit...
Chapter
This study constitutes a preliminary assessment of probabilistic tsunami inundation in the NE Atlantic region. We developed an event-tree approach to calculate the likelihood of tsunami flood occurrence and exceedance of a specific near-shore wave height for a given exposure time. Only tsunamis of tectonic origin are considered here, taking into ac...
Article
Submarine mass failures represent one of the most significant marine geo-hazards. Their importance as a major contributor to tsunami generation and hazard has been recognized over the last 20–30 years. This study investigates a newly mapped submarine landslide, the South Hirondelle Landslide (SHL), and its potential to generate a tsunami and to thr...
Article
Full-text available
The M~8.3–8.4 25th November 1941 was one of the largest submarine strike-slip earthquakes ever recorded in the North East (NE) Atlantic basin. This event occurred along the Eurasia-Nubia plate boundary between the Azores and the Strait of Gibraltar. After the earthquake, the tide stations in the NE Atlantic recorded a small tsunami with maximum amp...
Conference Paper
Full-text available
In this study, we present a methodology to reconstruct a Paleo Digital Elevation Model (PDEM) to alter geomor-phological contexts between the present and the desired paleo period. We aim to simulate a historical tsunami propagation in the same geomorphological contexts of the time of the event. The methodology uses a combination of historical data,...
Article
Full-text available
Tsunamis occur quite frequently following large magnitude earthquakes along the Chilean coast. Most of these earthquakes occur along the Peru–Chile Trench, one of the most seismically active subduction zones of the world. This study aims to understand better the characteristics of the tsunamis triggered along the Peru–Chile Trench. We investigate t...
Technical Report
Full-text available
This report focuses on large scale accessibility mapping and evacuation simulations of the ASTARTE test sites. It presents the main results achieved in the Task 9.4 of the WP9. The aim of this task is to provide operatives with scenario-based tools and solutions to develop evacuation plans for local communities. The hazard scenarios were based on t...
Conference Paper
Full-text available
Coastal areas in the North of Morocco are at risk of tsunami inundation. Overland tsunami propagation leads to widespread and dramatic changes in coastal morphology due to sediments erosion, transport and deposition processes. Tsunami sediments transport and morphological changes must take into consideration bed-load and suspended load transport of...
Presentation
Full-text available
Numerical tools turn to be very important for scenario evaluations of hazardous phenomena such as tsunami. Nevertheless, the predictions highly depends on the numerical tool quality and the design of efficient numerical schemes still receives important attention to provide robust and accurate solutions. In this study we propose a comparative study...
Article
Full-text available
The Tagus estuary is bordered by the largest metropolitan area in Portugal, the Lisbon capital city council. It has suffered the impact of several major tsunamis in the past, as shown by a recent revision of the catalogue of tsunamis that struck the Portuguese coast over the past two millennia. Hence, the exposure of populations and infrastructure...
Article
Full-text available
In this paper, we present a deterministic approach to tsunami hazard assessment for the city and harbour of Sines, Portugal, one of the test sites of project ASTARTE (Assessment, STrategy And Risk Reduction for Tsunamis in Europe). Sines has one of the most important deep-water ports, which has oil-bearing, petrochemical, liquid-bulk, coal, and con...
Conference Paper
Full-text available
Tsunamis are low frequency but high impact natural disasters. The NE Atlantic coast seems to be among the less tsunami threatened zones. Recent studies show that most destructive tsunamis in the NE Atlantic were generated by earthquakes located in the South West Iberian Margin (SWIM), such as the November, 1st, 1755 Lisbon Earthquake (8,75Mw), whic...
Article
Full-text available
In this paper, we present a scenario-based approach for tsunami hazard assessment for the city and harbour of Sines – Portugal, one of the test-sites of project ASTARTE. Sines holds one of the most important deep-water ports which contains oil-bearing, petrochemical, liquid bulk, coal and container terminals. The port and its industrial infrastruct...
Poster
Full-text available
Finite volume methods used to solve the shallow-water equation with source terms have received great attention in the two last decades due to its fundamental properties: the built-in conservation property, the capacity to treat correctly discontinuities and the ability to handle complex bathymetry configurations preserving the some steady-state con...
Article
Full-text available
It It is well documented that, in the past, catastrophic earthquakes and tsunamis affected the area as described in the historical records from the countries bordering the Gulf of Cadiz: Portugal, Spain and Morocco (cf. Baptista and Miranda, 2009; Figure 6.1). The main mechanism behind geohazard generation in this area is the interplate deformation...
Poster
Full-text available
We present the finite difference tsunami code NSWING (Non-linear Shallow Water model With Nested Grids), that solves the non-linear shallow water equations using the discretization and explicit leap-frog finite difference scheme, in a Cartesian or Spherical frame, as developed by Liu et al. (1998). An open boundary condition is used on the outward...
Conference Paper
Full-text available
Cette étude se focalise sur l'évaluation de la vulnérabilité des constructions dans la région d'Assilah (Nord du Maroc). La méthode considérée consiste à combiner à la fois, la modélisation numérique des tsunamis, les outils SIG et des données d'enquête sur le terrain. Comme sources de tsunami, nous considérons ici les scénarios de tremblement de t...
Article
Full-text available
On 26 January 1531, a strong-magnitude earthquake heavily impacted Lisbon downtown. Immediately after the earthquake, the eyewitnesses reported large waves in the Tagus estuary, mainly north of the city and along the northern bank of the river. Descriptions include large impacts on ships anchored in the estuary and even morphological changes in the...
Conference Paper
Full-text available
The tsunami became a global phenomenon that presents several and crucial worries. Recent events; such as 2011 Tohoku and 2004 Sumatra, have caused massive loss of life, destruction of coastal infrastructures and disruption to economical activities; hight lighting the need of to inverstegate tsunami hazard vulnerability and risk. The Atlantic coasts...
Conference Paper
Full-text available
In the aftermath of natural disasters, members of the affected com-munities are often the de facto first responders. Local volunteers can respond quickly, are strongly motivated, and have the necessary ground knowledge. However, their search and rescue efforts may be misdirected in the absence of information about the location and status of victims...
Article
Full-text available
The method presented here aims to assess the tsunami threat very rapidly after the occurrence of a large earthquake, using as input the parameters of the seismic source, and an approach based on Green's summation. We show that the main weakness of the approach (the need to consider only linear shallow water propagation) is largely compensated by th...