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Dineva, Savka; Batlló, Josep; Mihaylov, D.; Eck, T. van

doi:10.1023/a:1014249814998

Cited by 38 publications

(6 citation statements)

References 29 publications

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“…We computed the scalar seismic moment using the Dineva et al (2002) approach. Original analogue seismograms were digitized, and the seismic moment is computed independently from the spectra of body waves' ground motion for each component.…”

Section: The 25 November 1941 Earthquakementioning

confidence: 99%

New study on the 1941 Gloria Fault earthquake and tsunami

Baptista

Miranda

Batlló

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. 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 amplitudes of 40 cm peak to through in the Azores and Madeira islands. In this study, we present a re-evaluation of the earthquake epicentre location using seismological data not included in previous studies. We invert the tsunami travel times to obtain a preliminary tsunami source location using the backward ray tracing (BRT) technique. We invert the tsunami waveforms to infer the initial sea surface displacement using empirical Green's functions, without prior assumptions about the geometry of the source. The results of the BRT simulation locate the tsunami source quite close to the new epicentre. This fact suggests that the co-seismic deformation of the earthquake induced the tsunami. The waveform inversion of tsunami data favours the conclusion that the earthquake ruptured an approximately 160 km segment of the plate boundary, in the eastern section of the Gloria Fault between −20.249 and −18.630 • E. The results presented here contribute to the evaluation of tsunami hazard in the Northeast Atlantic basin.

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Section: The 25 November 1941 Earthquakementioning

confidence: 99%

New study on the 1941 Gloria Fault earthquake and tsunami

Baptista

Miranda

Batlló

et al. 2016

Nat. Hazards Earth Syst. Sci.

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“…Este terremoto, cuya magnitud se ha asignado en el rango de 6.0-6.6 dependiendo del autor (Kárník, 1969;Dineva et al, 2002;Stich et al, 2005;Teves-Costa et al, 2010), sucedió en los inicios de la monitorización sísmica en Europa, por lo que los registros instrumentales del evento son pocos y procedentes en su mayoría de estaciones lejanas. Tampoco hay registro de ruptura superficial.…”

Section: El Terremoto De Benavente De 1909unclassified

Iberfault 2022. IV Reunión Ibérica sobre Fallas Activas y Paleosismología. Volumen de resúmenes, Teruel, 7 al 10 de septiembre de 2022 ; 1ª ed.

2022

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SESIÓN 1: Tectónica activa y paleosismología de las Cordilleras Béticas (I) SESIÓN 2: Tectónica activa y paleosismología del resto de la Península Ibérica SESIÓN 3: Sismología y sismicidad inducida SESIÓN 4: Arqueosismología SESIÓN 5: Tectónica activa y paleosismología de las Cordilleras Béticas (II) SESIÓN 6: Tectónica activa en el medio marino SESIÓN 7: Geodesia aplicada a tectónica activa SESIÓN 8: Modelización sismotectónica

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“…The macroseismic intensities for the 1909 earthquake are presented in Figure 13 together with the ground motion model of Kotha et al (2016). Both the distribution of high intensities around Benavente, 45 km away from the Alviela trench site, and the moderate magnitude of the event (M6.0-6.2 estimated using early instrumental records, Dineva et al, 2002;Stich et al, 2005) make it most unlikely that the earthquake ruptured through the trench site. It is also unlikely that a triggered local shock associated with the Great 1755 Lisbon Earthquake would reach the trench site since the highest intensities (VIII-IX, IX, and IX-X) were located South of Vila Franca de Xira, 40 km away from the trench site (see https://www.…”

Section: Constraints From Ground Motion Scenarios and Macroseismic Inmentioning

confidence: 99%

“…It has been affected by damaging earthquakes in 1344, 1531, 1755, and 1909, with magnitude estimates for local events ranging from 6.0 to 6.9. (e.g., Dineva et al, 2002;Stich et al, 2005;Vilanova and Fonseca, 2007;Fonseca, 2020). The 1531 earthquake was the first known event in Portugal for which the damages were reported in a set of different localities (Moreira, 1984;Justo and Salwa, 1998).…”

Section: Introductionmentioning

confidence: 99%

Evidence of Surface Rupture Associated With Historical Earthquakes in the Lower Tagus Valley, Portugal. Implications for Seismic Hazard in the Greater Lisbon Area

Canora

Vilanova²,

Pro-Díaz

et al. 2021

Front. Earth Sci.

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The Lower Tagus Valley Fault, Portugal, has long been associated with the damaging earthquakes that affected the Greater Lisbon Area in historical times. These include a poorly documented earthquake that occurred in 1344, the relatively well-documented 1531 earthquake, and the most recent M6.0 1909 earthquake. In this work, we use a 0.5 m resolution LiDAR-based digital elevation model and a 0.5 cm resolution digital surface model based on UAV photogrammetry to accurately locate the fault scarps in the northernmost portion of the western fault strand and to select sites to perform paleoseimolological investigations. The paleoseismological and geochronological analysis performed in the Alviela trench site document the fault activity in the last 3000 years, including two earthquakes during historical times. We performed ground motion scenarios for 20 km, 40 km, and 60 km ruptures including the trench site. The ground motion fields obtained for the 40 km and 60 km ruptures are in agreement with most macroseismic intensity data available for the 1531 earthquake, implying a magnitude in the range M6.8–7.4. However, the degree of deformation preserved in the trench suggests a value closer to the lower magnitude bound. The intensity level observed in Lisbon in 1531 (IX) is lower than the modeled intensities for all considered scenarios and could be related to a particularly high level of vulnerability of the building stock.

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Cited by 38 publications

References 29 publications

New study on the 1941 Gloria Fault earthquake and tsunami

New study on the 1941 Gloria Fault earthquake and tsunami

Iberfault 2022. IV Reunión Ibérica sobre Fallas Activas y Paleosismología. Volumen de resúmenes, Teruel, 7 al 10 de septiembre de 2022 ; 1ª ed.

Evidence of Surface Rupture Associated With Historical Earthquakes in the Lower Tagus Valley, Portugal. Implications for Seismic Hazard in the Greater Lisbon Area

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