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The September 5, 2012 earthquake in Cangrejal of Samara had a magnitude and location in the place foreseen by the scientific work published by OVSICORI during the last fifteen years.
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The Volcanic and Seismological Observatory (OVSICORI) highlighted on their official website that the processing of data from the geodynamic control network of Nicoya Peninsula, formed by high-precision GPS, indicates to the scientists that the fault slid 1.85 meters of approximately 4 meters of potential sliding that exists below the peninsula.
From the data, the scientists determined that “the earthquake freed less than 50% of the accumulated energy.”
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Over 1500 aftershocks registered until Tuesday, September 1. Photo: OVSICORI |
“Therefore, the seismic cycle, which ends with discharging all of the accumulated energy in the seismic breach, has not yet concluded and we should continue following [the activity] in this important region of our country,” OVSICORI warns.
In agreement with the declarations of seismologist Marino Protti, the seismic energy that has not been freed could be freed by means of three mechanisms that are not incompatible.
He explained that one way to free energy is by means of aftershocks, another is the freedom of energy by means of aseismic sliding in the fault (without producing quakes), and the third possibility would be the occurrence of one or various earthquakes of considerable magnitude.
“Nevertheless, we do not have sufficient knowledge in order to determine if these earthquakes, if they do occur, could happen soon or within many years,” clarified Protti.
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