Santorini volcano (Greece): news
Santorini volcano (Greece): magma intrusion and inflation during 2011-2012 analyzed
lundi sept. 10, 2012 09:32 | AUTEUR : T
Santorini is in the headlines again, some of course saying that scientists detected evidence that Santorini is going to erupt soon.
The Santorini caldera cliffs, a text-book of volcanic deposits from large eruptions in the past
Although it is not really that much news any more, as similar studies have been presented earlier this year, the new study, published in the Nature Geoscience journal, presents new and more precise data and analysis of recent deformation measurements of the Santorini volcano during 2011-early 2012.
Following swarms of earthquakes in early 2011, Santorini began to inflate by about 14 centimeters, the most significant change since 1955, shortly after the last eruption in 1950.
Michelle Parks from Oxford University's Department of Earth Sciences describes her visits to Santorini in 2011:
The tour guides, who visit the volcano several times a day, would update me on changes in the amount of strong smelling gas being released from the summit, or changes in the color of the water in some of the bays around the islands. On one particular day in April 2011, two guides told me they had felt an earthquake while they were on the volcano and that the motion of the ground had actually made them jump. Locals working in restaurants on the main island of Thera became aware of the increase in earthquake activity due to the vibration and clinking of glasses in their bars.
Deformation was measured using high-recision GPS and satellite radar images at a precision of millimeters of movements of the earth's surface.
The study suggests that the inflation was caused by a magma intrusion between January 2011 and April 2012, and the volume of new magma that has accumulated beneath Santorini was estimated somewhere between 10 and 20 million cubic meters, about half the volume typically erupted during the latest eruptions in the 19th and 20th century.
- Evolution of Santorini Volcano dominated by episodic and rapid fluxes of melt from depth (Nature Geoscience)
jeudi, août 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. ... lire toutes
mardi, mai 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. ... " ... lire toutes
samedi, mai 26, 2012
mercredi, mai 23, 2012
A new study was published about the recent uplift detected on the volcanic island of Nea Kameni in the center of the Santorini caldera. The data were obtained using ESA's Envisat satellite and the measurements show that the northeastern part of Nea Kameni experienced an uplift of about 5 cm in 2011, while other areas of the volcano rose some 3–4 cm. This inflation was associated with the elevated seismic activity during the past months and can be interpreted caused by the injection of fresh magma under the the volcano. ... lire toutes
jeudi, mai 10, 2012