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11-29 août 2020: Kamchatka - Land of Colors - Kamchatka (Russia)
21-31 août 2020: Islands of Fire and Whales - Kurile Islands (Russia)
3-19 sept. 2020: Les volcans actifs de Java - Java (Indonésie)
20-30 sept. 2020: Les Volcans d'Ambrym - La Grande Traversée - Vanuatu
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Santorini volcan
Caldera (complexes strato) 329 m (on caldera rim) / 128 m (top of most recent lava shield, Nea Kameni)
Cyclades, Greece, 36.4°N / 25.4°E
Condition actuelle: normal / en sommeil (1 sur 5)
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Eruptions du volcan Santorini:
1613 BC +-7 years (the so-called "Minoan eruption", one of the largest plinian eruptions during the past 10,000 years on earth) 197 BC, 46/47 AD, 726, 1570-1573, 1707-1711, 1866-1870, 1925-1928, 1939-1941, 1950
Style éruptif tipique:
Dominantly explosive, with effusive activity during intervals. Powerful explosive, so-called Plinian eruptions appear to occur every 10-30,000 years. Construction of lava shields and minor to irregularly spaced subplinian explosive activity during interval times.
Derniers séismes proches
Voyages au volcan Santorini
Lumière de la mer Égée (voyage photo 8 jours à Santorin, Cyclades, Grèce)
Santorini & Milos (9-days combination walking & study tour to Santorini and Milos Islands, Greece)

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Santorini volcano (Greece): news

Santorini volcano (Greece): new data of deformation during 2011-2012 show volcanic unrest has ended

Wednesday Jan 30, 2013 09:01 AM | AUTEUR : T

Uplift at Santorini during the 2011-2012 unrest
Uplift at Santorini during the 2011-2012 unrest
According to the latest seismic and satellite (InSAR and GPS) data, the uplift at the Santorini volcano (2011-2012) has has come to an end.
In a recent press release, the Institute for Astronomy, Astrophysics, Space Applications & Remote Sensing and the Dionysos Satellite Observatory, published their results of follow up studies in Santorini with the collaboration of MIT.
For the first time, the severe deformation (more than 10 cm in some areas) that mainly affected Nea Kameni and the northeastern caldera during 2011-early 2012, has been accurately quantified using advanced remote sensing techniques (PSI and SBAS) with satellite data and extended geodetic measurements (cGPS).

from the press release
"The volcanic unrest began in January 2011 and diminished around the end of February 2012. These results are documented in a manuscript in press [Papoutsis et al., 2013] at Geophysical Research Letters. An early view of the work can be found in onlinelibrary.wiley.com/doi/10.1029/2012GL054137/abstract, published online on 26 of January 2013.

"In Papoutsis et al. [2013] the surface deformation associated with Santorini volcanic activity is measured with the use of Envisat ASAR data and the application of two well-established Interferometric Synthetic Aperture Radar techniques, namely Persistent Scatterer Interferometry and Small BAseline Subset, producing dense line-of-sight (LOS) ground deformation maps depicting uplift with a radially decaying pattern in amplitude and velocity from the center of
deformation.
"These can be seen in the fi gure that follows, where the maximum inflation of 150mm/yr, an unprecedent magnitude for Santorini since quantitative monitoring of the area began, is observed at Nea Kameni (a resurgent dome within the caldera), and in Imerovigli and Fira in Thera island (northeast of Nea Kameni) - well known touristic destinations.

"It is concluded fi nally in Papoutsis et al. [2013] that InSAR and the latest seismic and GPS data, spanning up to December 2012, suggest that the rapid inflation episode ceased since the end of February 2012. The observed displacement has declined signi cantly, reaching more than 80mm/yr of velocity change in certain sites. These observations are possibly signaling a new phase of relative stability and reducing the probability of an imminent volcanic eruption, following empirical knowledge from calderas that experienced similar inflation episodes in the past.

References
- Andrew V. Newman, Stathis Stiros, Lujia Feng, Panos Psimoulis, Fanis Moschas, Vasso Saltogianni, Yan Jiang, Costas Papazachos, Dimitris Panagiotopoulos, Eleni Karagianni, and Domenikos Vamvakaris (2012) "Recent geodetic unrest at Santorini Caldera, Greece" Geophysical Research Letters, 39(6):L06309, 2012. ISSN 0094-8276. doi: 10.1029/2012GL051286
- Ioannis Papoutsis, Xanthos Papanikolaou, Mike Floyd, Kang Hyeun Ji, Charalampos Kontoes, Demitris Paradissis, and Vangelis Zacharis (2013) "Mapping inflation at Santorini volcano, Greece, using GPS and InSAR." Geophysical Research Letters, 2013. ISSN 1944-8007. doi: 10.1029/2012GL054137.
- Michelle M. Parks, Juliet Biggs, Philip England, Tamsin A. Mather, Paraskevi Nomikou, Kirill Palamartchouk, Xanthos Papanikolaou, Demitris Paradissis, Barry Parsons, David M. Pyle, Costas Raptakis, and Vangelis Zacharis. (2012) "Evolution of Santorini Volcano dominated by episodic and rapid fluxes of melt from depth." Nature Geoscience, 5(10):749{754, 2012. ISSN 1752-0894. doi: 10.1038/ngeo1562
Actualités précédentes

Saturday, Sep 22, 2012
In recent days, many posts have spring up again speculating about increased seismic activity and a possible new eruption in some near future at Santorini. We cannot see any such. No unusual concentration of earthquakes is visible near the island in the past weeks. [details]

Wednesday, Sep 12, 2012
Join us on a relaxed walking and study tour to get to know Santorini's geology and natural history and much more with geologist Tom Pfeiffer. There are free spaces for the 13-21 Oct trip! [details]
The Santorini caldera cliffs, a text-book of volcanic deposits from large eruptions in the past
Monday, Sep 10, 2012
Santorini is in the headlines again, some of course saying that scientists detected evidence that Santorini is going to erupt soon. ... [details]
Seismic recording showing "tremor" under Nea Kameni ?
Thursday, Aug 09, 2012
Looking at recent seismic plots, one might get the impression that volcanic tremor is visible on the seismic recordings of Santorini volcano. However, there should be a big questionmark to this interpretation. [details]
Tuesday, May 29, 2012
We're always happy to receive some feedback about our tours. Geology student Isabel from Tübingen writes about the recent tour on Santorini: "This trip, the first holiday since the beginning of my studies, fulfilled everything I had dreamed about: hiking, geology, and culture in a most pleasant mix. The trip was both relaxing and inspiring as well. ... " [details]
 

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