Two earthquakes occurred on the 10th of October in Galicia.
The first one was the strongest, with an intensity of 3.2 degrees on the Richter scale. It took place in the Atlantic Ocean, next to the Death Coast, at 9:30 p.m.
A few hours later, specifically, at 11:28 p.m., another earthquake took place in the Atlantic Ocean; but this time closer to the coast and with an intensity of 2.1 degrees.
However, these weren’t the only earthquakes that happened that day. There were two other: the first one in Zafarraya (Málaga), with 3.4 degrees; and the other one, in Salar y Loja (Granada), which was the second of that day and the third one in a series of earthquakes that happened in just three days in that zone.
Also, a third earthquake took place in Galicia the next day, in As Nogais (Lugo), with an intensity of 1.5 degrees.
Why do these earthquakes occur? Because if we think about it, Galicia isn’t an area characterized for them, and if there is any, it is usually soft, because the continental crust of our zone has a large percentage of granite on its composition and it is difficult to move it a lot. In the last 15 years, there were just about 80 earthquakes of more 2 degrees on the Richter scale.
The reason of these movements is the divergent boundary between the North American and the Eurasian plate, because minor earthquakes are one of the characteristics of these boundaries as the tectonic plates move apart.