The Easter Sunday 2011 Earthquake Swarm Offshore Malta: Analysis on Felt Reports

Agius, Matthew; D’Amico, Sebastiano; Galea, Pauline

doi:10.1007/978-3-319-21753-6_27

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…Tosi et al, 2000). Macroseismology can reveal these intensity patterns and is therefore often used in conjunction with studies on peak ground acceleration (Atkinson and Wald, 2007;Lesueur et al, 2012;Martin et al, 2015;Souriau, 2006;Worden et al, 2000), site effect analysis (Nguyen et al, 2004;Sbarra et al, 2012a), induced seismicity (Hough, 2014) and vulnerability assessment in civil engineering (García Moreno and Camelbeeck, 2013;Stefano and Chiara, 2014), taking into account population density (Agius et al, 2016;Boatwright and Phillips, 2017).…”

Section: Introductionmentioning

confidence: 99%

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach

et al. 2017

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Abstract. The online collection of earthquake reports in Europe is strongly fragmented across numerous seismological agencies. This paper demonstrates how collecting and merging online institutional macroseismic data strongly improves the density of observations and the quality of intensity shaking maps. Instead of using ZIP code Community Internet Intensity Maps, we geocode individual response addresses for location improvement, assign intensities to grouped answers within 100 km2 grid cells, and generate intensity attenuation relations from the grid cell intensities. Grid cell intensity maps are less subjective and illustrate a more homogeneous intensity distribution than communal ZIP code intensity maps. Using grid cells for ground motion analysis offers an advanced method for exchanging transfrontier equal-area intensity data without sharing any personal information. The applicability of the method is demonstrated on the felt responses of two clearly felt earthquakes: the 8 September 2011 ML 4.3 (Mw 3.7) Goch (Germany) and the 22 May 2015 ML 4.2 (Mw 3.7) Ramsgate (UK) earthquakes. Both events resulted in a non-circular distribution of intensities which is not explained by geometrical amplitude attenuation alone but illustrates an important low-pass filtering due to the sedimentary cover above the Anglo-Brabant Massif and in the Lower Rhine Graben. Our study illustrates the effect of increasing bedrock depth on intensity attenuation and the importance of the WNW–ESE Caledonian structural axis of the Anglo-Brabant Massif for seismic wave propagation. Seismic waves are less attenuated – high Q – along the strike of a tectonic structure but are more strongly attenuated – low Q – perpendicular to this structure, particularly when they cross rheologically different seismotectonic units separated by crustal-rooted faults.

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Section: Introductionmentioning

confidence: 99%

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach

et al. 2017

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Historical Memory and Natural Hazards in Neogeographic Mapping Technologies

Pascale

D’Amico

2016

Springer Geography

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A multi-hazard historical catalogue for the city-island-state of Malta (Central Mediterranean)

et al. 2022

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The city-island-state of Malta is traditionally viewed as a low-hazard country with the lack of a long historical catalogue of extreme events and their impacts acting as an obstacle to formulating evidence-based policies of disaster risk reduction. In this paper, we present the first multi-hazard historical catalogue for Malta which extends from the Miocene to 2019 CE. Drawing on over 3500 documents and points of reference, including historical documentary data, official records and social media posts, we identify at least 1550 hazard events which collectively have caused the loss of at least 662 lives. Recognising that historical materials relating to Malta are complicated by the presence of a strong temporal bias, we establish a four-point reliability indicator and apply this to each of the 1065 recordings, with the result that some 79% show a high degree of reliability. For an island state where there are significant gaps in the knowledge and understanding of the environmental extremes and their impacts over time, this paper addresses and fills these gaps in order to inform the development of public-facing and evidence-based policies of disaster risk reduction in Malta.

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The Easter Sunday 2011 Earthquake Swarm Offshore Malta: Analysis on Felt Reports

Cited by 6 publications

References 15 publications

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach

Historical Memory and Natural Hazards in Neogeographic Mapping Technologies

A multi-hazard historical catalogue for the city-island-state of Malta (Central Mediterranean)

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The Easter Sunday 2011 Earthquake Swarm Offshore Malta: Analysis on Felt Reports

Cited by 6 publications

References 15 publications

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent &lt;i&gt;M&lt;/i&gt;4 earthquakes in northwest Europe using a grid cell approach

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent &lt;i&gt;M&lt;/i&gt;4 earthquakes in northwest Europe using a grid cell approach

Historical Memory and Natural Hazards in Neogeographic Mapping Technologies

A multi-hazard historical catalogue for the city-island-state of Malta (Central Mediterranean)

Contact Info

Product

Resources

About

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach

Path and site effects deduced from merged transfrontier internet macroseismic data of two recent <i>M</i>4 earthquakes in northwest Europe using a grid cell approach