Contact | RSS | EN | DE | EL | ES | FR | IT | RU

São Jorge Island (Azores): seismic swarm could be from magma intrusion, possible precursor of volcanic eruption?

Sun, 20 Mar 2022, 22:35
22:35 PM | BY: T
Quakes under Sao Jorge Island in the past 24 hours
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.
Some of the tremors were felt be the population. There is no clear information yet as to the cause of this seismic swarm, in particular whether it is likely caused by a magmatic intrusion at some depth, which could be a precursor or an indication of the re-awakening of the volcano, which last erupted more than 200 years ago in 1808.
To better interpret these quakes, more geophysical data is needed, especially whether there is ground deformation as well, something to expect if magma influx at depth is indeed the cause of the quakes.

The last volcanic activity from São Jorge volcano occurred more than 200 years ago in 1808. The volcanic activity on the narrow, elongated island is mainly related to fissure eruptions from the central rift system.
The current seismic swarm makes many remember the earthquake swarms that preceded the 2021 eruption on La Palma in the neighboring Canary Islands...
São Jorge volcano
fissure vents 1053 m
Azores Islands, Portugal, 38.66°N / -28.11°W
Current status: restless (2 out of 5) São Jorge volcano eruptions:
1580, 1808
Typical eruption style
Effusive
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings