Wed, 20 Jul 2022, 14:00
A seismic swarm at São Jorge began at 1605 on 19 March along a WNW-ESE fissure system stretching from Ponta dos Rosais to Norte Pequeno - Silveira. The seismic data as well as deformation data indicated a magmatic intrusion, though by early April no significant deformation was detected. The frequency of earthquakes had decreased in late May-early June, leading CIVISA to lower the Alert Level to V3 (on a scale of V0-V6) on 8 June.
Thu, 14 Jul 2022, 10:00A seismic swarm at São Jorge began at 1605 on 19 March along a WNW-ESE fissure system stretching from Ponta dos Rosais to Norte Pequeno - Silveira. The seismic data as well as deformation data indicated a magmatic intrusion, though by early April no significant deformation was detected. The frequency of earthquakes had decreased in late May-early June, leading CIVISA to lower the Alert Level to V3 (on a scale of V0-V6) on 8 June.
Fri, 8 Apr 2022, 06:56

Depth of quakes over time under Sao Jorge volcano
The seismic swarm under the island's northwestern rift zone has decreased a lot during the past days, but it is still ongoing at lower levels.
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Wed, 6 Apr 2022, 20:07A seismic swarm beneath the W half of São Jorge began at 1605 on 19 March, with earthquakes along the Manadas volcanic fissure system between Velas (S side of the island) and Fajã do Ouvidor (N coast). On 31 March there were 714 seismic events detected, according to a preliminary analysis of seismic records. As the week progressed, the number of daily events fluctuated from 397 on 1 April to 592 on 5 April; magnitudes were relatively low.
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Fri, 1 Apr 2022, 18:38
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Seismic trace of ROSA station on São Jorge island as of 1 April 2022 evening
The earthquake swarm continues but with reduced intensity. Only about 10 quakes above magnitude 2.0 occurred in the past 24 hours, although micro-seismic activity remains elevated, and seems to be increasing in the past hours.
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Wed, 30 Mar 2022, 19:54A seismic swarm beneath the W half of São Jorge began at 1605 on 19 March, with earthquakes along the Manadas volcanic fissure system between Velas (S side of the island) and Fajã do Ouvidor (N coast). CIVISA raised the Alert Level to V2 and then V3 (on a scale of V0-V6) during the morning of 20 March, and finally to V4 that afternoon. On 22 March Proteção Civil e Bombeiros dos Açores noted that, although no official evacuations had been issued, vulnerable people such as patients in the Velas health center were being moved to other locations on the island.
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Wed, 30 Mar 2022, 09:05
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Seismic trace of ROSA station on São Jorge island, showing the magnitude 4 quake in the evening
The seismic swarm continues with the first occurrence of
a widely felt magnitude 4 quake last night at 9:56 pm local time, the strongest so-far in the current swarm. The quake was about 10 times larger than the previous largest-so-far quake, a magnitude 3.3 event at 6.41 pm on 19 March.
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Tue, 29 Mar 2022, 07:08
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Detected ground deformation at São Jorge island (image: CIVISA)
According to latest calculations, the Volcanological Institute of the Canary Islands (INVOLCAN) estimated that as much as 20 million cubic meters of magma have intruded under the island of São Jorge since last March 19.
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Mon, 28 Mar 2022, 15:29
While hundreds of people have already left the island, especially from Velas, authorities seem to take the situation very serious. Emergency plans are being activated and the army is setting up camps in case people need to evacuate their homes.
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Mon, 28 Mar 2022, 15:14
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Seismic trace of ROSA station on São Jorge island, showing small quakes and what could be an episode of tremor (image:
Preliminary satellite-based radar data confirm that a section of island's northern part, roughly corresponding to where the recent quakes have been occurring, has experienced uplift.
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Mon, 28 Mar 2022, 01:52
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Distribution of earthquakes at São Jorge Island in an NW-SE elongated area (image: CIVISA)
The volcano-seismic crisis on the island continues.
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Sat, 26 Mar 2022, 08:15An earthquake swarm started under the NW part of the island on 19 March 2022. More than 2000 mostly small quakes of magnitudes from 1.6-3.5 have been registered within the first few days of the activity.
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Sat, 26 Mar 2022, 07:47
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Latest quakes over time under Sao Jorge Island
The volcano-seismic crisis on the island continues. Quakes decreased a bit after the first 48 hours since the swarm started on 19 March, but picked up again lately to almost match the initial intensity.
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Wed, 23 Mar 2022, 19:09
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Quakes under Sao Jorge Island in the past 24 hours as well as distribution of depths over time
The seismic swarm under the northern part of the island continues, but at somewhat lower intensity today.
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Mon, 21 Mar 2022, 08:37
More than 100 quakes of magnitudes between 2.0 and 2.9 occurred during the last 24 hours beneath the island. Therefore, we have set up a new page to monitor earthquakes under São Jorge Island, Azores.
Sun, 20 Mar 2022, 22:35
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Quakes under Sao Jorge Island in the past 24 hours
A swarm of earthquakes has started yesterday under the northwestern half of São Jorge Island (Azores), with 19 quakes of magnitudes between 2.0-3.5 and many more smaller ones.
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