Abstract
One condition to perform seismic hazard analysis is knowledge about seismogenic zones that is an invaluable source of information and play an important role because it is fundamental know the processes and properties that control the seismogenic zone. The aim of this work is distinguishing seismogenic zones in the Azores region applying different parameters such as the earthquake density, b-values, focal mechanism, historical seismicity and all of these conjugated within the geodynamic framework of the Azores. We identified 10 seismogenic zones plus the well known Mid Atlantic Ridge. The 10 zones we identified are over the major tectonic structures of the Archipelago, namely Terceira Rift and Linear Volcanic Ridges.
Highlights
Seismology deals with the study of the activity of physical forces responsible for the origin of earthquakes and the seismic waves generated within the Earth
In the 20th century, the acquisition and analysis of massive amounts of observations and information was made possible by progresses in instrumentation, electronics and information technology
Knowledge of the interior of the Earth mainly results from work conducted in the 20th century: in 1887 John Milne (1850-1913) identified the crust, Lord Rayleigh, Lord Rutherford and Emil Wiechert the mantle; the limit between the crust and the mantle was defined by Andrya Mohorovicic in 1909; in 1906, Oldham’s remarkable work determined the size of the Earth’s outer core; Beno Gutenberg (1889-1960), in 1912 in his doctoral thesis, defined the boundary between the outer nucleus and the mantle
Summary
Seismology deals with the study of the activity of physical forces responsible for the origin of earthquakes and the seismic waves generated within the Earth. All structures located from the center of the Earth to its surface are the subject of study in this discipline. Seismology pursues the understanding of the Earth’s internal structure and the physical processes that cause earthquakes, resorting to advanced instruments for observation and measurements. This paper presents an overview of important milestones in the seismological field, followed by revolutions in the instrumentation and observation of seismological events
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