The seismic event occurred at 12:53 Italian time, or 4:53 a.m. on the northwest coast of the United States. According to data collected by experts, the hypocenter was located approximately 9 kilometers below the ocean floor.
Along these geological structures, movements occur through lateral sliding of rock masses, frequently triggering shallow earthquakes like the one recorded in recent hours.
The shallow depth of the earthquake, only 9 kilometers below the seabed, confirms its shallow nature and explains why it was clearly detected by seismic monitoring instruments.
The precedent of the great earthquake of 1700
Researchers note that the entire region is part of the Cascadia subduction zone, a gigantic geological structure nearly a thousand kilometers long, considered one of the most dangerous in the world.
Historical and geological research has shown that this fault was responsible for one of the most powerful earthquakes ever recorded in the region. In January 1700, the Cascadia subduction zone generated a megathrust earthquake estimated at between magnitudes 8.7 and 9.2, accompanied by a tsunami that crossed the entire Pacific Ocean and reached the coast of Japan.
The magnitude 5.8 earthquake recorded off the coast of Oregon caused no damage or lasting impact on coastal populations. Experts point out that events of this magnitude occur regularly in the region and are part of the natural process of releasing accumulated tension between tectonic plates. However, this earthquake confirms once again the extreme geological activity of the American Northwest, a region that continues to be closely monitored by the international scientific community due to its seismic potential and the risks associated with future major events in the Cascadia subduction zone.
