Help Ukraine

Campi Flegrei volcano (Italy): micro-seismic activity picks up

Сб, 13 ноя 2021, 16:59
Quakes under the Campi Flegrei volcano in Italy since Oct 2021 (image: INGV)
Quakes under the Campi Flegrei volcano in Italy since Oct 2021 (image: INGV)
Another weak seismic swarm is in progress under Europe's most active caldera. Since yesterday, 12 weak earthquakes have occurred at shallow depths of mostly around 2 km under the ground since yesterday.
None of these quakes was strong enough to be felt, but the very sensitive monitoring network of the Vesuvius volcano observatory of INGV (also responsible to monitor the Phlegrean Fields, and Ischia volcanoes) has detected an increase of micro-seismic activity already since October this year. In total, there have been 212 weak tremors in the area of ​​the caldera. 126 quakes of these occurred between Pozzuoli, the Solfatara-Pisciarelli area and the Gulf of Pozzuoli.
Other parameters of volcanic unrest also remain above normal levels: Ground inflation is continuing slowly, but has totaled 87 cm uplift since 2005 in the most affected area near the Rione Terra GPS station.
Gas emissions also continue to increase again, after having been on a decreasing trend in the previous months. This concerns especially carbon dioxide (CO2) diffusing through the ground, which is an early indicator of fresh magma arriving at depth, and measured in the area of the Pisciarelli fumaroles.
Whether the current phase of unrest is sign of new magma accumulating and possibly getting ready for an eruption is far from certain. According to the scientists, the phenomena are likely part of the normal behavior of the caldera, which is characterized by so-called bradysism cycles - sustained periods of alternating slow ground up- and downlift. These are caused by gradual fluctuations or changes in temperature, composition and other geophysical properties of the very large and active hydrothermal system in the underground of the upper few kilometers.
Such changes, e.g. temperature changes of the ground water and the contained gas bubbles in pores and rock fractures will make the ground "breathe" over long periods (years to centuries); imagine a dough with very active fermentation processes in its inside, will cause the crust to go up and down as gases are created, trapped and released, and the activity of fermentation changing with the temperatures it is exposed to.

Предыдущие новости

Mon, 27 Apr 2020, 12:05
Location of earthquakes (C) INGV
A seismic swarm occurred beneath the Phlegrean Fields. This swarm began at 03:51 on 26/04/2020 and was made up of 34 earthquakes with magnitudes ranging from 0.0 to 3.1 and hypocentral depth between 1-2 km. There have been no new fumarole openings reported. ... Read all
Thu, 27 Feb 2020, 16:14
Deformation (inflation) of some points in the Campi Flegrei caldera (image: INGV OV)
The latest report of the Vesuvius Volcano Observatory (INGV OV) shows that inflation of the Pozzuoli area continues at steady rates of up to 0,7 cm per month, totaling over 10 cm during the past 10 years for some places. Read all
Показать больше
Попробуйте наше бесплатное приложение!
Volcanoes & Earthquakes - new app for Android
Android | версия iOS

Подробнее о VolcanoDiscovery

Why is there advertising on this site?
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:
  • Earthquake archive from 1900 onwards
  • 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!
Copyrights: VolcanoDiscovery and other sources as noted.
Использование материалов: Большинство текстов и изображений, в частности фотографий, на этом веб-сайте защищены авторским правом. Дальнейшее воспроизведение и использование без разрешения обычно не разрешается. Если вы не уверены или нуждаетесь в лицензионных правах на фотографии, например, для публикаций и коммерческого использования, свяжитесь с нами.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint | EN | DE | EL | ES | FR | IT | RU
Follow us:Следите за нами на ФейсбукеFollow us on InstagramСледуйте за нами на TwitterПосетите наш канал на Youtube