São Jorge without earthquakes for two days
Açoriano Oriental reported yesterday that the Azores Seismovolcanic Information and Surveillance Center (CIVISA) had not identified, in the preceding 24 hours, earthquakes felt by the population on the island of São Jorge, for the second consecutive day.
According to CIVISA’s daily communiqué on the status of the seismovolcanic crisis on that island in the Azorean archipelago, from 10:00 pm on Wednesday until 10:00 am Thursday, “no earthquake was felt” and the same happened between the 10:00 am and 10:00 pm on Wednesday.
There have also been no earthquakes felt since Tuesday morning – the last record of tremors felt by the population was at 7:07 that morning, according to CIVISA data.
266 earthquakes felt so far
Since the seismovolcanic crisis, which began on March 19, 266 earthquakes have been identified by the population on the island of São Jorge, the press release adds. However, CIVISA also mentions that “the seismic activity that has been registered on that island continues above normal”, from Ponta dos Rosais to the Norte Pequeno – Silveira area.
The earthquake of the greatest magnitude (3.8 on the Richter scale) occurred on March 29 at 9:56 pm. A previous report of one slightly stronger, at 4.1 on the same scale, seems to have been downgraded.
According to the Richter scale, earthquakes are classified according to their magnitude as micro (less than 2.0), very small (2.0-2.9), small (3.0-3.9), slight (4.0-4.9), moderate (5.0-5.9), strong (6.0-6.9), large (7.0-7.9), important (8.0-8 .9), exceptional (9.0-9.9) and extreme (when greater than 10).
The island maintains volcanic alert level V4 (eruption threat) out of a total of seven, where V0 stands for “resting state” and V6 “eruption in progress”.
Thanks to PeterA for the link
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