5 documents found, page 1 of 1
Local Seismic Tomography Reveals the Crustal Structure Beneath Arraiolos (Centr...
Hamak, Ines; Wachilala, Piedade; Borges, José; Koulakov, Ivan; Araújo, Alexandre; Bezzeghoud, MouradAn ML 4.9 earthquake occurred in Arraiolos, central Alentejo, on the 15 January 2018. As the mainshock was recorded as the highest magnitude in the region, a thorough investigation of the cause of this seismicity was carried out. In this study, local seismic tomography was conducted for the first time to demonstrate the importance of a uniform spatial distribution of earthquakes for obtaining accurate crustal i...
Seismic Sequence Analysis of the Arraiolos Zone, South Portugal, and Its Seismo...
Wachilala, Piedade; Borges, José; Caldeira, Bento; Bezzeghoud, MouradThe Arraiolos Zone has been affected by the persistent superficial seismicity (focal depth < 20 km) of a weak magnitude (M < 4) and some events of a higher magnitude (M > 4), and is mainly located around the Aldeia da Serra village. On 15 January 2018, at 11:51 UTC, the largest instrumental earthquake recorded in that area occurred, with a magnitude (ML 4.9) located northeast of Arraiolos, near the Aldeia da Se...
Source parameters of the moderate‐sized (ML 4.9) 2018 Arraiolos, Portugal earth...
Wachilala, Piedade; Borges, José; Caldeira, Bento; Bezzeghoud, MouradThe Arraiolos zone is one of the most seismically active intraplate regions in mainland Portugal and is characterized by low- to moder- ate-magnitude events. However, there is a need to analyse the characteristics of the seismic source parameters in this zone, which is crucial for under- standing the origin of the zone’s seismicity and gaining insights into the stresses involved in the rupture processes of seis...
The Portuguese national seismic network: products and services
Carrilho, Fernando; Custodio, Susana; Bezzeghoud, Mourad; Oliveira, Carlos; Marreiros, Célia; Vales, Dina; Alves, Paulo; Pena, AreosaPortugal, located in the southwest region of the Eurasian plate, has been affected by several destructive earthquakes throughout its history, the most well-known being the 1755 Great Lisbon earthquake. The seismicity of the territory, both in the mainland and in the Azores and Madeira islands, has prompted the continuous development of seismic monitoring, from the first known macroseismic inquiry, following the...
Methods of earth building in the Huila Province, Angola
Wachilala, Piedade; Duarte, Isabel M. R.; Pinho, António B.In Angola, the construction made of raw earth is a cultural heritage widely used by low income households, representing over 80% of the population [1, 3]. In Huila province is evident construction in raw earth in a large scale, either in urban or in periurban and rural areas. The construction methods follow the ancestral standards, distributed throughout the region of Huila, being built by the several ethnic gr...