Seismic hazard assessment in continental Ecuador

Zoning of Ecuador According to Maximum Magnitudes of Earthquakes and their Frequency of Occurrence using Statistical Models Estimated by Maximum Likelihood

“…[9]. The results of the seismic hazard investigations by [10] are similar to those presented by the Ecuadorian Standard in terms of rock acceleration; however, they differ in the southern part of the country [10].…”

“…This zone experiences the highest seismic activity, given the large number of active faults present; however, when compared to Zones 1 and 4, the lengths of its faults are less long. Table 12 summarizes the results of a comparison of expected magnitudes derived from the probabilistic model (return period 475 y) with maximum magnitudes estimated in the subduction models as proposed by [10] and [18]. The authors' most representative zoning was compared with that of the K-Means clustering method for the lower and upper limits of the 95% confidence interval.…”

“…On the other hand, the seismicity of a place can be characterized using probabilistic models such as the study carried out by [11]. They developed seismic hazard maps using probabilistic models of PGA, differing from [9] and [10] in their zoning.…”

Methodological approach for the estimation of a new velocity model for continental Ecuador

“…However, the geometry of the subduction of the oceanic plate by depth contours has been consistented with the tectonic and seismic characteristics of the region, proposing a subduction start of a low slope, which would be the cause of accumulation of tension and seismicity generation until a depth of 40 to 50 km [10][11][12], to later increase its slope to beyond the East of the Andes (Figure 2). …”

Lessons Learnt From the 2009 Padang Indonesia, 2011 Tōhoku Japan and 2016 Muisne Ecuador Earthquakes

“…However, an earthquake and tsunami of such magnitude was not expected. Considering the significance of the event, a multidisciplinary EEFIT team of 9 was sent to conduct an initial field mission (27th May to 4th June 2011) with a focus on assessing damage to buildings and coastal infrastructure [ (Parra et al, 2016). Much of the observed damage due to this event extends south along the coast from the hypocentre in the Manabi region.…”